Add test cases to test valid and invalid keys in FindInMap
Add test cases to test valid and invalid keys in FindInMap

Partially Fixes issue #111

Signed-off-by: Steven Dake <8638f3fce5db0278cfbc239bd581dfc00c29ec9d@redhat.com>

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