[maven-release-plugin] prepare release parent-pom-8

git-svn-id: https://svn.apache.org/repos/asf/uima/build/trunk@1554663 13f79535-47bb-0310-9956-ffa450edef68
[maven-release-plugin] prepare for next development iteration

git-svn-id: https://svn.apache.org/repos/asf/uima/build/trunk@1554665 13f79535-47bb-0310-9956-ffa450edef68