Initialise resources when service is created.
Initialise resources when service is created.

Without this, calls to validate_template will fail until the first
parser.Stack is created.

resources.initialise() is called in EngineService __init__
to avoid this happening in another service method in the future
Fixes: bug #1181045

Change-Id: I68a74ec7993aff4b74d449a3ae33315b93e9cb0d

NeCTAR-RC/heat,dragorosson/heat,takeshineshiro/heat,takeshineshiro/heat,dims/heat,NeCTAR-RC/heat,maestro-hybrid-cloud/heat,varunarya10/heat,noironetworks/heat,JioCloud/heat,jasondunsmore/heat,miguelgrinberg/heat,rdo-management/heat,redhat-openstack/heat,pratikmallya/heat,ntt-sic/heat,dragorosson/heat,cwolferh/heat-scratch,cwolferh/heat-scratch,srznew/heat,jasondunsmore/heat,rickerc/heat_audit,gonzolino/heat,cryptickp/heat,rh-s/heat,openstack/heat,rickerc/heat_audit,cryptickp/heat,openstack/heat,JioCloud/heat,rdo-management/heat,steveb/heat,steveb/heat,pratikmallya/heat,noironetworks/heat,pshchelo/heat,maestro-hybrid-cloud/heat,srznew/heat,varunarya10/heat,dims/heat,ntt-sic/heat,citrix-openstack-build/heat,miguelgrinberg/heat,pshchelo/heat,citrix-openstack-build/heat,gonzolino/heat,redhat-openstack/heat,rh-s/heat