[tcm-py]: Make tcm_createvirtdev() remove leftover configfs directory on subsystem createvirtdev() failure.
[tcm-py]: Make tcm_createvirtdev() remove leftover configfs directory on subsystem createvirtdev() failure.

This patch calls os.rmdir() on the newly created cfs_dev_path if the subsystem createvirtdev()
call return an exception.

Signed-off-by: Nicholas A. Bellinger <978acd1567d5598152161fdf8bf3ca568f950c9b@linux-iscsi.org>

Datera/lio-utils,Datera/lio-utils,Datera/lio-utils,Datera/lio-utils