Gradle extension release v0.4.0 (#2671)
Gradle extension release v0.4.0 (#2671)

* [Gradle Release Plugin] - pre tag commit:  'v0.4.0-gradle-extension'.

* [Gradle Release Plugin] - new version commit:  'v0.4.1-SNAPSHOT-gradle-extension'.
GoogleContainerTools/jib,GoogleContainerTools/jib,GoogleContainerTools/jib,GoogleContainerTools/jib