CORE-1651 Correct MySQL/Undercloud service list

This commit adds nova-consoleauth to the list of services which
has been identified as a new service on the undercloud and updates
the MySQL stop/start to be in line with the steps taken with
controller nodes in order for ansible to correctly stop/start MySQL.

Change-Id: I6aaa4b3a7bf5c65498936156df285193e69322ce