Set language to c to fix latest bindep problems
Set language to c to fix latest bindep problems

Newer bindep versions are not working with languages not
set to en_US. As a workaround, export the LANG setting.

Workaround for: https://storyboard.openstack.org/#!/story/2001205

Change-Id: I60be976ff151bb61014f0272cdf02a4fb4851d0a

openstack/bifrost,openstack/bifrost