[maven-release-plugin] prepare release killbill-oss-parent-0.4.11
[maven-release-plugin] prepare release killbill-oss-parent-0.4.11

killbill/killbill-oss-parent,rocketlawyer/killbill-oss-parent,kares/killbill-oss-parent,aeq/killbill-oss-parent,andrenpaes/killbill-oss-parent,maguero/killbill-oss-parent