brick_status_data.get() could fail if the variable is None

[yocalebo]

  File "/usr/lib/python3/dist-packages/glustercli/cli/volume.py", line 187, in status_detail
    return parse_volume_status(volume_execute_xml(cmd),
  File "/usr/lib/python3/dist-packages/glustercli/cli/parsers.py", line 301, in parse_volume_status
    brick_online = brick_status_data.get("online", False)
AttributeError: 'NoneType' object has no attribute 'get'

• also update debian/changelog to match the github release

[thetuxinator]

Can somebody accept this please?