[maven-release-plugin] prepare release syncope-1.1.7

git-svn-id: https://svn.apache.org/repos/asf/syncope/branches/1_1_X@1586608 13f79535-47bb-0310-9956-ffa450edef68
[maven-release-plugin] prepare for next development iteration

git-svn-id: https://svn.apache.org/repos/asf/syncope/branches/1_1_X@1586610 13f79535-47bb-0310-9956-ffa450edef68