title: Error: Cause: compileSdkVersion is not specified after install plugin
body: <p>I tried to install this <a href="https://github.com/stephanenicolas/ormlite-android-gradle-plugin" rel="nofollow noreferrer">plugin</a>. firstly i got<br/></p>
  
  <p><code>Can not add task 'clean' as a task with that name already exists.</code></p>
  
  <p><br/>then I fixed it by commented this lines</p>
  
  <pre><code>//
  //task clean(type: Delete) {
  //    delete rootProject.buildDir
  //}
  </code></pre>
  
  <p>in the <strong>build.gradle (Project:XXX)</strong></p>
  
  <pre><code>// Top-level build file where you can add configuration options common to all sub-projects/modules.
  
  buildscript {
  
      repositories {
          google()
          jcenter()
          mavenCentral()
      }
      dependencies {
          classpath 'com.android.tools.build:gradle:3.3.0'
          classpath 'com.github.stephanenicolas.ormgap:ormgap-plugin:1.0.13'
  
          // NOTE: Do not place your application dependencies here; they belong
          // in the individual module build.gradle files
      }
  }
  
  apply plugin: 'com.android.application'
  apply plugin: 'ormgap'
  
  allprojects {
      repositories {
          google()
          jcenter()
          mavenCentral()
      }
  }
  //
  //task clean(type: Delete) {
  //    delete rootProject.buildDir
  //}
  
  
  
  </code></pre>
  
  <p>then I got error </p>
  
  <p><code>Cause: compileSdkVersion is not specified.</code>
  even thoght it's already specified in build.gradle file</p>
  
  <p><strong>build.gradle</strong></p>
  
  <pre><code>apply plugin: 'com.android.application'
  
  android {
      compileSdkVersion 27
      buildToolsVersion "27.0.3"
      useLibrary 'org.apache.http.legacy'
      defaultConfig {
          applicationId "www.pro_cs_is.com"
          minSdkVersion 15
          targetSdkVersion 27
          versionCode 1
          versionName "1.0"
          testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
      }
      buildTypes {
          release {
              minifyEnabled false
              proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
          }
      }
  }
  
  dependencies {
      implementation fileTree(include: ['*.jar'], dir: 'libs')
      implementation 'com.android.support:appcompat-v7:27.1.1'
      implementation 'com.android.support:animated-vector-drawable:27.1.1'
      implementation 'com.android.support:exifinterface:27.1.1'
      implementation 'com.android.support:design:27.1.1'
      implementation 'com.android.support.constraint:constraint-layout:1.1.1'
      implementation 'com.android.support:cardview-v7:27.1.1'
      testImplementation 'junit:junit:4.12'
      androidTestImplementation 'com.android.support.test:runner:1.0.2'
      androidTestImplementation ('com.android.support.test.espresso:espresso-core:3.0.2',{
      exclude group: 'com.google.code.findbugs'})
      implementation 'com.squareup.retrofit2:retrofit:2.4.0'
      implementation 'com.squareup.retrofit2:converter-gson:2.4.0'
      implementation 'com.github.bumptech.glide:glide:4.7.1'
      implementation 'org.jsoup:jsoup:1.11.3'
      implementation 'com.google.apis:google-api-services-blogger:v3-rev57-1.23.0'
      implementation 'com.squareup.picasso:picasso:2.71828'
      implementation 'com.j256.ormlite:ormlite-android:5.1'
      implementation 'com.j256.ormlite:ormlite-core:5.1'
  }
  
  
  </code></pre>