title: Maven scm git tag behaving strangely
body: <p>I am not a Maven expert and so this might be obvious, but it defies everything that I've seen and read.</p>
  
  <p>I am using the git scm provider to create a tag. I can get it to work correctly, but I have to supply the tag on the command line and put the scm info in the parent POM.</p>
  
  <p>If I don't move the scm info to the parent it complains that the connectionUrl is not defined. Works fine in parent POM (not a big deal I guess).</p>
  
  <p>Next is more of a pain with the tag
  <code>
  [ERROR] Failed to execute goal org.apache.maven.plugins:maven-scm-plugin:1.9.4:tag (default-cli) on project mavenIRIS: The parameters 'tag' for goal org.apache.maven.plugins:maven-scm-plugin:1.9.4:tag are missing or invalid -> [Help 1]
  </code></p>
  
  <p>And here is my POM info:</p>
  
  <pre><code>    &lt;profile&gt;
          &lt;id&gt;updateTag&lt;/id&gt;
          &lt;activation&gt;
              &lt;activeByDefault&gt;false&lt;/activeByDefault&gt;
              &lt;property&gt;
                  &lt;name&gt;build.mode&lt;/name&gt;
                  &lt;value&gt;release&lt;/value&gt;
              &lt;/property&gt;
          &lt;/activation&gt;
  
          &lt;build&gt;
              &lt;plugins&gt;
                  &lt;plugin&gt;
                      &lt;groupId&gt;org.apache.maven.plugins&lt;/groupId&gt;
                      &lt;artifactId&gt;maven-scm-plugin&lt;/artifactId&gt;
                      &lt;version&gt;1.9.4&lt;/version&gt;
                      &lt;configuration&gt;
                          &lt;git&gt;jgit&lt;/git&gt;
                          &lt;tag&gt;testTag&lt;/tag&gt;
                          &lt;connectionType&gt;connection&lt;/connectionType&gt;
                      &lt;/configuration&gt;
                      &lt;dependencies&gt;
                          &lt;dependency&gt;
                              &lt;groupId&gt;org.apache.maven.scm&lt;/groupId&gt;
                              &lt;artifactId&gt;maven-scm-provider-jgit&lt;/artifactId&gt;
                              &lt;version&gt;1.9.4&lt;/version&gt;
                          &lt;/dependency&gt;
                      &lt;/dependencies&gt;                     
                      &lt;executions&gt;
                          &lt;execution&gt;
                          &lt;goals&gt;
                              &lt;goal&gt;tag&lt;/goal&gt;
                          &lt;/goals&gt;
                          &lt;/execution&gt;
                      &lt;/executions&gt;
                  &lt;/plugin&gt;
              &lt;/plugins&gt;
          &lt;/build&gt;
      &lt;/profile&gt;
  </code></pre>
  
  <p>Thanks</p>