Fix unicodeerror when heat-engine start
Fix unicodeerror when heat-engine start

If change local language to other languages(like ja), heat-engine
will failed to start.

Closes-Bug: #1446958
Change-Id: Ia3cbcebb86257bc1c52ea758c1583191e5a52a2d
(cherry picked from commit 0b3dd7be3d3cd9842616a16843d03e6c13cdcb08)

miguelgrinberg/heat,miguelgrinberg/heat,rh-s/heat,gonzolino/heat,steveb/heat,maestro-hybrid-cloud/heat,openstack/heat,jasondunsmore/heat,pratikmallya/heat,srznew/heat,dims/heat,cryptickp/heat,steveb/heat,takeshineshiro/heat,takeshineshiro/heat,dims/heat,cwolferh/heat-scratch,jasondunsmore/heat,rh-s/heat,dragorosson/heat,dragorosson/heat,cwolferh/heat-scratch,openstack/heat,maestro-hybrid-cloud/heat,noironetworks/heat,srznew/heat,gonzolino/heat,cryptickp/heat,noironetworks/heat,pratikmallya/heat