Revert "[maven-release-plugin] prepare release p4-1.8.13"
Revert "[maven-release-plugin] prepare release p4-1.8.13"

This reverts commit f0adce1a7bc8d1eae9ab44c24c8d5339175087bd.

jenkinsci/p4-plugin,jenkinsci/p4-plugin,jenkinsci/p4-plugin