heat API : Escape JSON TemplateBody XML serialization
heat API : Escape JSON TemplateBody XML serialization

AWS API defines JSON templates returned inside XML "wrapper"
this change escapes XML serialization of TemplateBody content
ref #152

Change-Id: I7e38dd2010b03061979f0906b582f9461c85cabc
Signed-off-by: Steven Hardy <4d1810d1ff6d7f22d774341c4549c02173d2f2ab@redhat.com>

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