Build plan release v0.3.0 (#2593)
Build plan release v0.3.0 (#2593)

* [Gradle Release Plugin] - pre tag commit:  'v0.3.0-build-plan'.

* [Gradle Release Plugin] - new version commit:  'v0.3.1-SNAPSHOT-build-plan'.
GoogleContainerTools/jib,GoogleContainerTools/jib,GoogleContainerTools/jib,GoogleContainerTools/jib