Fix RPC revision log entry for 4.6
Fix RPC revision log entry for 4.6

For some reason, this entry was added to the should-be-set-in-stone
Liberty release section of the RPC change log.

Change-Id: Iae889ceac957ef26de847fe0bbc427124c1c9bf2

mikalstill/nova,cloudbase/nova,Juniper/nova,cernops/nova,hanlind/nova,gooddata/openstack-nova,Juniper/nova,alaski/nova,rahulunair/nova,rajalokan/nova,zhimin711/nova,Juniper/nova,klmitch/nova,dims/nova,bigswitch/nova,cyx1231st/nova,mahak/nova,cloudbase/nova,openstack/nova,openstack/nova,vmturbo/nova,zhimin711/nova,klmitch/nova,bigswitch/nova,CEG-FYP-OpenStack/scheduler,alaski/nova,gooddata/openstack-nova,rajalokan/nova,dims/nova,BeyondTheClouds/nova,NeCTAR-RC/nova,cernops/nova,mikalstill/nova,jianghuaw/nova,cloudbase/nova,sebrandon1/nova,klmitch/nova,jianghuaw/nova,hanlind/nova,NeCTAR-RC/nova,vmturbo/nova,mahak/nova,vmturbo/nova,gooddata/openstack-nova,Juniper/nova,vmturbo/nova,sebrandon1/nova,klmitch/nova,sebrandon1/nova,BeyondTheClouds/nova,rajalokan/nova,mikalstill/nova,rajalokan/nova,jianghuaw/nova,BeyondTheClouds/nova,cyx1231st/nova,rahulunair/nova,CEG-FYP-OpenStack/scheduler,gooddata/openstack-nova,jianghuaw/nova,mahak/nova,hanlind/nova,rahulunair/nova,phenoxim/nova,cernops/nova,openstack/nova,phenoxim/nova