title: Google app engine- deploy using maven 2.0.0-rc1 is not working
body: <pre><code>Caused by: java.lang.IllegalArgumentException: Deployment projectId must be defined or configured to read from system state
  1. Set &lt;deploy.projectId&gt;my-project-id&lt;/deploy.projectId&gt;
  2. Set &lt;deploy.projectId&gt;APPENGINE_CONFIG&lt;/deploy.projectId&gt; to use &lt;application&gt; from appengine-web.xml
  3. Set &lt;deploy.projectId&gt;GCLOUD_CONFIG&lt;/deploy.projectId&gt; to use project from gcloud config.
      at com.google.cloud.tools.maven.AppEngineStandardDeployer.setDeploymentProjectAndVersion (AppEngineStandardDeployer.java:152)
  </code></pre>
  
  <p>I tried to provide the projectId using various ways, it is not working. 
  I tried to provide the projectId using properties in the pom.xml file </p>
  
  <pre><code>&lt;properties&gt;
          &lt;deploy.projectId&gt;APPENGINE_CONFIG&lt;/deploy.projectId&gt;
  &lt;/properties&gt;
  </code></pre>
  
  <p>But that didn't solve the issue. Then I tried to do, mvn appengine:deploy -DprojectId=APPENGINE_CONFIG</p>
  
  <p>also tried -Ddeploy.projectId=APPENGINE_CONFIG. 
  I am not sure where I should have this property.</p>
  
  <p>This started happening especially after trying the latest 2.0.0-rc1 appengine-maven-plugin. </p>
  
  <p><a href="https://github.com/GoogleCloudPlatform/app-maven-plugin" rel="nofollow noreferrer">https://github.com/GoogleCloudPlatform/app-maven-plugin</a></p>