added release-plugin and related configuration to top pom
introduced separate parent pom project
added explicit version to antrun-plugin in parent pom
[maven-release-plugin] prepare release drg-apigw-apis-parent-1.0.0
[maven-release-plugin] rollback the release of drg-apigw-apis-parent-1.0.0
fixed scm section in parent pom
[maven-release-plugin] prepare release 1.0.0