Give sudo powers in Disable mysql task.
Give sudo powers in Disable mysql task.

In order to allow the external upgrade tasks disable
the galera bundle we need to run the task as sudo, otherwise
the task will fail with: Error: unable to get cib.

Change-Id: Id2916738ff36961fc9489a828e02545024fd5ab0

dprince/tripleo-heat-templates,openstack/tripleo-heat-templates,openstack/tripleo-heat-templates,dprince/tripleo-heat-templates