MRELEASE-431 - Configuration of policy for calculating next (release) version

according to what discussed and agreed offline with Robert Scholte, project modules restructured taking maven-scm as good example to base on the structure

git-svn-id: https://svn.apache.org/repos/asf/maven/release/trunk@1584741 13f79535-47bb-0310-9956-ffa450edef68