install.sh simplify heat-engine.conf conditional
install.sh simplify heat-engine.conf conditional

Minor tweak to the conditional detecting heat-engine.conf to sed in the
encryption key - this will allow rabbitmq detection to only be done in
one place

ref bug 1090420

Signed-off-by: Steven Hardy <4d1810d1ff6d7f22d774341c4549c02173d2f2ab@redhat.com>
Change-Id: I9031218796a52efd350c39167ecb112048dad218

rdo-management/heat,maestro-hybrid-cloud/heat,rickerc/heat_audit,pshchelo/heat,takeshineshiro/heat,pratikmallya/heat,redhat-openstack/heat,NeCTAR-RC/heat,srznew/heat,rh-s/heat,takeshineshiro/heat,openstack/heat,cryptickp/heat,cwolferh/heat-scratch,JioCloud/heat,cryptickp/heat,gonzolino/heat,rickerc/heat_audit,miguelgrinberg/heat,citrix-openstack-build/heat,steveb/heat,Triv90/Heat,noironetworks/heat,varunarya10/heat,varunarya10/heat,maestro-hybrid-cloud/heat,miguelgrinberg/heat,citrix-openstack-build/heat,Triv90/Heat,srznew/heat,JioCloud/heat,rdo-management/heat,jasondunsmore/heat,cwolferh/heat-scratch,NeCTAR-RC/heat,pshchelo/heat,steveb/heat,gonzolino/heat,redhat-openstack/heat,pratikmallya/heat,ntt-sic/heat,Triv90/Heat,jasondunsmore/heat,ntt-sic/heat,dims/heat,rh-s/heat,dragorosson/heat,openstack/heat,dims/heat,noironetworks/heat,dragorosson/heat