[*] fix backport
The following exception was thrown by libcloud when trying to run the initial deployment:
'NoneType' object has no attribute 'startswith'

Traceback (most recent call last):
  File "/usr/local/lib/python2.7/dist-packages/salt/cloud/__init__.py", line 51, in _call
    ret = func(*args, **kw)
  File "/usr/local/lib/python2.7/dist-packages/salt/cloud/__init__.py", line 2110, in create_multiprocessing
    output.pop('deploy_kwargs', None)
AttributeError: 'bool' object has no attribute 'pop'