staging: lustre: obd: cleanup client import if client_obd_setup fails

staging: lustre: obd: cleanup client import if client_obd_setup fails

client_obd_setup() allocates an obd_import which should be cleaned up
if there is any failure afterwards in callers of client_obd_setup().
This patch fixes the bug in osc_setup(), mgc_setup(), mdc_setup() and
lwp_setup(). The fix is to call obd_cleanup_client_import() before
calling client_obd_cleanup() in case of an error.

Signed-off-by: Swapnil Pimpale <spimpale@ddn.com>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-3810
Reviewed-on: http://review.whamcloud.com/7561
Reviewed-by: John L. Hammond <john.hammond@intel.com>
Reviewed-by: Lai Siyao <lai.siyao@intel.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Signed-off-by: James Simmons <jsimmons@infradead.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>