kolla-build does not handle exception in case docker service is stopped

I accidently invoked kolla-build with docker service was stopped and ran into following exception

$ kolla-build
INFO:kolla.cmd.build:Found the docker image folder at /usr/share/kolla/docker
ERROR:kolla.cmd.build:Error while fetching server API version: ('Connection aborted.', error(2, 'No such file or directory'))
Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/kolla/cmd/build.py", line 78, in docker_client
    return docker.Client(version='auto', **docker_kwargs)
  File "/usr/lib/python2.7/site-packages/docker/client.py", line 77, in __init__
    self._version = self._retrieve_server_version()
  File "/usr/lib/python2.7/site-packages/docker/client.py", line 97, in _retrieve_server_version
    'Error while fetching server API version: {0}'.format(e)
DockerException: Error while fetching server API version: ('Connection aborted.', error(2, 'No such file or directory'))