Remove LANG=C from rootwrap invocations

For more than a decade already, systems support LC_ALL=C,
which overwrites LANG=C, so setting both is only confusing.

Change-Id: I5640b9cb747892162a856315ea7331cfea7cba5a
Merge "Remove LANG=C from rootwrap invocations"
Merge remote-tracking branch 'origin/master' into jiocloud_devmaster