Maven release v2.7.0 (#2922)
Maven release v2.7.0 (#2922)

* [Gradle Release Plugin] - pre tag commit:  'v2.7.0-maven'.

* [Gradle Release Plugin] - new version commit:  'v2.7.1-SNAPSHOT-maven'.
GoogleContainerTools/jib,GoogleContainerTools/jib,GoogleContainerTools/jib,GoogleContainerTools/jib