Define engine service in setUp()
Define engine service in setUp()

Init test engine service in setUp() instead of defining
in each tests.

Change-Id: I6ecb5355b0d07248a0d3d5a908c35a6d33d13ed1

dims/heat,jasondunsmore/heat,gonzolino/heat,cwolferh/heat-scratch,openstack/heat,gonzolino/heat,noironetworks/heat,noironetworks/heat,jasondunsmore/heat,dragorosson/heat,dragorosson/heat,openstack/heat,steveb/heat,dims/heat,cwolferh/heat-scratch,steveb/heat