Rename killbill-util -> killbill-clock for commons
Rename killbill-util -> killbill-clock for commons

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