title: Missing api_key/current key with Google Services 3.0.0
body: <p>Since I upgraded the project with the latest version of google services and libraries (9.0.0), I have this strange issue :</p>
  
  <p><a href="https://i.stack.imgur.com/AgOJN.png"><img src="https://i.stack.imgur.com/AgOJN.png" alt="Error build"></a></p>
  
  <p>Grade console :</p>
  
  <pre><code>:app:processDebugGoogleServices
  Parsing json file: /Users/cyrilmorales/Documents/Projects/mobilemeans-punainenristi/app/google-services.json
  :app:processDebugGoogleServices FAILED
  Error:Execution failed for task ':app:processDebugGoogleServices'.
  &gt; Missing api_key/current_key object
  Information:BUILD FAILED
  </code></pre>
  
  <p>build.gradle (root) :</p>
  
  <pre><code>dependencies {
      classpath 'com.android.tools.build:gradle:2.2.0-alpha1'
      classpath 'com.google.gms:google-services:3.0.0'
  }
  </code></pre>
  
  <p>build.gradle (app) :</p>
  
  <pre><code>dependencies {
      ....
      compile 'com.google.android.gms:play-services-analytics:9.0.0'
      compile 'com.google.android.gms:play-services-gcm:9.0.0'
      compile 'com.google.android.gms:play-services-maps:9.0.0'
      compile 'com.google.android.gms:play-services-location:9.0.0'
      ...
  }
  apply plugin: 'com.google.gms.google-services'
  </code></pre>
  
  <p>However, it works well with the play service libraries in 8.4.0 and google-services 2.1.0</p>
  
  <p>Do you have any idea of the solution ?</p>