[maven-release-plugin] prepare release gcloud-maven-plugin-2.0.9.120.v20160803
[maven-release-plugin] prepare release gcloud-maven-plugin-2.0.9.120.v20160803

GoogleCloudPlatform/gcloud-maven-plugin,GoogleCloudPlatform/gcloud-maven-plugin,GoogleCloudPlatform/gcloud-maven-plugin