Add needed strtime functions from nova
Add needed strtime functions from nova

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

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