Remove usages of deprecated name LoopingCall in rpc
Remove usages of deprecated name LoopingCall in rpc

LoopingCall has been renamed to FixedIntervalLoopingCall
(no functional changes, so a 1:1 replace is just fine)

Closes-Bug: #1307560

Change-Id: Ic8ecf0b57b659446966d7501b8bc49316ff462b0

changsimon/trove,changsimon/trove,mmasaki/trove,zhangg/trove,hplustree/trove,cp16net/trove,zhujzhuo/openstack-trove,cp16net/trove,openstack/trove,mmasaki/trove,redhat-openstack/trove,zhangg/trove,cp16net/trove,zhujzhuo/openstack-trove,changsimon/trove,openstack/trove,redhat-openstack/trove,redhat-openstack/trove,zhujzhuo/openstack-trove,mmasaki/trove,hplustree/trove,fabian4/trove,fabian4/trove,fabian4/trove