Align update_policy section heading with HOT
Align update_policy section heading with HOT

Change-Id: I88f864b3a8624deafbf852c9cebe0cbf01f01821

dragorosson/heat,maestro-hybrid-cloud/heat,openstack/heat,pratikmallya/heat,dims/heat,maestro-hybrid-cloud/heat,noironetworks/heat,dragorosson/heat,noironetworks/heat,cwolferh/heat-scratch,jasondunsmore/heat,pratikmallya/heat,cwolferh/heat-scratch,openstack/heat,dims/heat,gonzolino/heat,gonzolino/heat,steveb/heat,jasondunsmore/heat,steveb/heat