title: PTTest is failing and not generating mutation coverage
body: <p>I want to generate mutation test coverage. I am doing POC on PI Test
  but it is not taking my test classes and failing. I have configured PTTest plugin in pom.xml. I checked the target class package name and target test class package name are correct in pom.xml file. </p>
  
  <p>I am getting below error - </p>
  
  <pre><code>10:50:29 AM PIT &gt;&gt; INFO : Mutating from D:\IR\workspace\cleanup_trunk\reporterDx-service\target\classes
  10:50:29 AM PIT &gt;&gt; INFO : Verbose logging is disabled. If you encounter an problem please enable it before reporting an issue.
  10:50:30 AM PIT &gt;&gt; INFO : Sending 0 test classes to slave
  10:50:30 AM PIT &gt;&gt; INFO : Sent tests to slave
  10:50:30 AM PIT &gt;&gt; INFO : Calculated coverage in 0 seconds.
  10:50:30 AM PIT &gt;&gt; INFO : Created  0 mutation test units
  [INFO] ------------------------------------------------------------------------
  [INFO] BUILD FAILURE
  [INFO] ------------------------------------------------------------------------
  [INFO] Total time: 4.575s
  [INFO] Finished at: Wed Sep 02 10:50:30 IST 2015
  [INFO] Final Memory: 13M/244M
  [INFO] ------------------------------------------------------------------------
  [ERROR] Failed to execute goal org.pitest:pitest-maven:1.1.4:mutationCoverage (default-cli) on project reporterDx-service: Execution default-cli of goal org.pitest:p
  itest-maven:1.1.4:mutationCoverage failed: No mutations found. This probably means there is an issue with either the supplied classpath or filters.
  [ERROR] See http://pitest.org for more details.
  [ERROR] -&gt; [Help 1]
  org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.pitest:pitest-maven:1.1.4:mutationCoverage (default-cli) on project reporterDx-ser
  vice: Execution default-cli of goal org.pitest:pitest-maven:1.1.4:mutationCoverage failed: No mutations found. This probably means there is an issue with either the
  supplied classpath or filters.
  See http://pitest.org for more details.
          at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:225)
          at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
          at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
          at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:84)
          at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:59)
          at org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild(LifecycleStarter.java:183)
          at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:161)
          at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:320)
          at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156)
          at org.apache.maven.cli.MavenCli.execute(MavenCli.java:537)
          at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:196)
          at org.apache.maven.cli.MavenCli.main(MavenCli.java:141)
          at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
          at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
          at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
          at java.lang.reflect.Method.invoke(Method.java:606)
          at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:290)
          at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:230)
          at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:409)
          at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:352)
  Caused by: org.apache.maven.plugin.PluginExecutionException: Execution default-cli of goal org.pitest:pitest-maven:1.1.4:mutationCoverage failed: No mutations found.
   This probably means there is an issue with either the supplied classpath or filters.
  See http://pitest.org for more details.
          at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:110)
  </code></pre>
  
  <p>This is my pom.xml file -</p>
  
  <pre class="lang-xml prettyprint-override"><code>&lt;plugin&gt;
      &lt;groupId&gt;org.pitest&lt;/groupId&gt;
      &lt;artifactId&gt;pitest-maven&lt;/artifactId&gt;
      &lt;version&gt;1.1.4&lt;/version&gt;
      &lt;configuration&gt;
          &lt;targetClasses&gt;
              &lt;param&gt;com.mutation.dx.pitestdemo&lt;/param&gt;
          &lt;/targetClasses&gt;
          &lt;targetTests&gt;
              &lt;param&gt;com.mutation.dx.pitestdemo&lt;/param&gt;
          &lt;/targetTests&gt;
      &lt;/configuration&gt;
  &lt;/plugin&gt;
  </code></pre>
  
  <p>below is my class on which I want to generate mutation </p>
  
  <pre class="lang-java prettyprint-override"><code>package com.mutation.dx.pitestdemo;
  
  import org.springframework.beans.factory.annotation.Autowired;
  
  public class PIDemoImpl implements PIDemo {
  
      @Autowired
      private PIDemoDao piDemoDao; 
  
      @Override
      public PIDto getPIDetails(String name, int firstNumber,int secondNumber) {
          int thirdNumber = firstNumber * secondNumber;
          PIDomain piDomain =  piDemoDao.getPIDomain(name, thirdNumber);
          if(piDomain != null) {
              PIDto piDto = new PIDto();
              piDto.setName(piDomain.getName());
              int result = piDomain.getX() + piDomain.getY();
              if(result &gt;= 0 ) {
                  piDto.setResult(result);
              }
              return piDto;
          }
          return null;
      }
  }
  </code></pre>
  
  <p>below is my test class-</p>
  
  <pre class="lang-java prettyprint-override"><code>package com.mutation.dx.pitestdemo;
  
  import org.junit.Assert;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  import org.mockito.InjectMocks;
  import org.mockito.Mock;
  import static org.mockito.Mockito.when;
  import static org.mockito.Mockito.verify;
  import org.mockito.runners.MockitoJUnitRunner;
  
  import com.mutation.dx.pitestdemo.PIDemoImpl;
  
  @RunWith(MockitoJUnitRunner.class)
  public class PIDemoImplTest {
      @Mock
      private PIDemoDao piDemoDao;
  
      @InjectMocks
      PIDemoImpl piDemoImpl;
  
      @Test
      public void getPIDetailsTest(){
          String name = "Persistent";
          int firstNumber = 0;
          int secondNumber = 10;
          int thirdNumber = 0;
          PIDomain piDomain = new PIDomain();
          piDomain.setName(name);
          piDomain.setX(2);
          piDomain.setY(2);
          when(piDemoDao.getPIDomain(name, thirdNumber)).thenReturn(piDomain);
          PIDto piDto = piDemoImpl.getPIDetails(name , firstNumber, secondNumber);
          Assert.assertNotNull(piDto);
          Assert.assertEquals(piDto.getName(),name);
          verify(piDemoDao).getPIDomain(name, thirdNumber);
      }
  }
  </code></pre>
  
  <p>I am using mockito to mock the objects.</p>