Force the SSH commands to use their default language

SSH commands often have to parse an output and do some pattern matchings
(e.g using grep) that makes those commands dependent on the system
language and causing it to fail on systems with a non-english locale
setting.

This patch forces the SSH commands to use their default language
(whatever language the strings in the application was written in) for
output by passing LC_ALL=C as part of the command. For virsh, vmware,
vbox and prlctl the default language is english making the commands from
the SSH driver to work independent of the system language.

Closes-Bug: #1373671
Change-Id: I175d84fca4e10b8c9468bc4fe54ecd865725e39c
Merge "Force the SSH commands to use their default language"