Deprecate mox in favor of mox3

Instead of having to use both mox and mox3, just pick
mox3.

Change-Id: I98fde1a748da97db2a8e6ac99d5354b44edb1c28
Signed-off-by: Chuck Short <chuck.short@canonical.com>
Merge "Deprecate mox in favor of mox3"