Some plugin and deps updates

git-svn-id: https://svn.apache.org/repos/asf/syncope/branches/1_2_X@1621743 13f79535-47bb-0310-9956-ffa450edef68
Merge remote-tracking branch 'upstream/1_2_X' into 1_2_X
[maven-release-plugin] prepare release syncope-1.2.0-M1