Release v2.4.1 (#390)
Release v2.4.1 (#390)

* [Gradle Release Plugin] - pre tag commit:  'v2.4.1'.

* [Gradle Release Plugin] - new version commit:  'v2.4.2-SNAPSHOT'.
GoogleCloudPlatform/app-gradle-plugin,GoogleCloudPlatform/app-gradle-plugin,GoogleCloudPlatform/app-gradle-plugin