Description of problem:
Create_fs function failed with signal only works in main thread error
when its called thru vdsm client.

Version-Release number of selected component (if applicable):
openlmi-scripts version: 0.3.0-1

How reproducible:
It works well if its been called directly, however
it fails when its been consumed by another client like vdsm-client
and called.

Actual results:
MainProcess|Thread-16::ERROR::2014-09-05 13:26:45,847::storageconf::445::Openlmi::(brickCreate) signal only works in main thread
Traceback (most recent call last):
  File "/usr/share/vdsm/gluster/storageconf.py", line 438, in brickCreate
    fs.create_fs(ns, [lvName], fsys)
  File "/usr/lib/python2.7/site-packages/lmi/scripts/storage/fs.py", line 194, in create_fs
    (ret, outparams, err) = service.SyncLMI_CreateFileSystem(**args)
  File "/usr/lib/python2.7/site-packages/lmi/shell/LMIMethod.py", line 550, in __call__
    (rval, call_rparams, call_errorstr) = self.__handle_synchro_method_call_polling(job_inst)
  File "/usr/lib/python2.7/site-packages/lmi/shell/LMIMethod.py", line 422, in __handle_synchro_method_call_polling
    LMISignalHelper().signal_attach()
  File "/usr/lib/python2.7/site-packages/lmi/shell/LMIMethod.py", line 86, in signal_attach
    self._handler_sigint  = signal.signal(signal.SIGINT,  LMISignalHelper.__signal_handler)
ValueError: signal only works in main thread