Rename new lxc.cmd_run*, lxc.cmd_retcode functions
Rename new lxc.cmd_run*, lxc.cmd_retcode functions

These are often typo'ed due to their resemblance to cmd.run,
cmd.run_stdout, etc. This commit renames them, removing the "cmd_" and
making them lxc.run, lxc.run_stdout, etc.

Now's the time to do this since these functions have not yet seen an
official release.

saltstack/salt,saltstack/salt,saltstack/salt,saltstack/salt,saltstack/salt