title: Observed package id 'build-tools;20.0.0' in inconsistent location
body: <pre><code>  ./gradlew --parallel :app:assembleDebugTest
  </code></pre>
  
  <p>when i run above command in <strong>android studio</strong> terminal i got this error.</p>
  
  <p><strong>Error</strong>
  Parallel execution is an incubating feature. 
   <strong>Observed package id 'build-tools;20.0.0' in inconsistent location 'sdk/build-tools/android-4.4W' (Expected 'sdk/build-tools/20.0.0')</strong></p>
  
  <p>Gradle file
             apply plugin: 'com.android.application'</p>
  
  <pre><code>    android {
              compileSdkVersion 22
              buildToolsVersion '23.0.2'
              packagingOptions {
                      exclude 'LICENSE.txt'
              }
              defaultConfig {
                      applicationId "package"
                      minSdkVersion 15
                      targetSdkVersion 22
                      versionCode 1
                      versionName "1.0"
                      testApplicationId "package.test"
                      testInstrumentationRunner "package.test.Instrumentation"
              }
              buildTypes {
                      release {
                              minifyEnabled false
                              proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
                      }
              }
              sourceSets {
                      androidTest {
                              assets.srcDirs = ['src/androidTest/assets']
                      }
              }
              adbOptions {
                      timeOutInMs 60000 // set timeout to 1 minute
              }
      }
  
      dependencies {
              compile fileTree(dir: 'libs', include: ['*.jar'])
              compile 'com.android.support:appcompat-v7:22.2.1'
              compile project(':sdk')
              androidTestCompile('com.android.support.test:runner:0.4') {
                      exclude module: 'support-annotations'
              }
              androidTestCompile('com.android.support.test:rules:0.4') {
                      exclude module: 'support-annotations'
              }
              androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.1') {
                      exclude module: 'support-annotations'
              }
  
              androidTestCompile 'org.mockito:mockito-core:1.+'
              androidTestCompile 'com.google.dexmaker:dexmaker:1.2'
              androidTestCompile 'com.google.dexmaker:dexmaker-mockito:1.2'
              androidTestCompile('com.android.support.test.espresso:espresso-contrib:2.2.1') {
                      exclude module: 'support-annotations'
                      exclude group: 'com.android.support', module: 'appcompat'
                      exclude group: 'com.android.support', module: 'support-v4'
                      exclude module: 'recyclerview-v7'
              }
  
              androidTestCompile 'info.cukes:cucumber-android:1.2.0@jar'
              androidTestCompile 'info.cukes:cucumber-picocontainer:1.2.0'
      }
  </code></pre>
  
  <p>Reference : <strong>Cucumber</strong> Android Test  <a href="https://github.com/cucumber/cucumber-jvm/tree/master/examples/android/android-studio/Cukeulator">link</a></p>