Update release notes

git-svn-id: https://svn.apache.org/repos/asf/cxf/branches/2.7.x-fixes@1562509 13f79535-47bb-0310-9956-ffa450edef68
Blocking revisions 1562476,1562477,1562478,1562479 via  git from
https://svn.apache.org/repos/asf/cxf/trunk



git-svn-id: https://svn.apache.org/repos/asf/cxf/branches/2.7.x-fixes@1562510 13f79535-47bb-0310-9956-ffa450edef68