Don't crash if there is no "AWS::CloudFormation::Init" section.
Don't crash if there is no "AWS::CloudFormation::Init" section.

Signed-off-by: Angus Salkeld <86b65304d27d8de73dd7d624c33df7e088f8d94b@redhat.com>

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