tree afd1be0ee571b0e7c887235cba7254ed837f1c57
parent 41d645ae368e335a61d7604da0f04d191b8c4e75
author Sam Stoelinga <sammiestoel@gmail.com> 1478458264 -0800
committer Sam Stoelinga <sammiestoel@gmail.com> 1478460400 -0800

Fix #7 volume not started because of salt version

glusterfs.started module does not work with older salt version minions.
This patch checks for whether salt minion is older than 2016.3.0 and if
so utilizes cmd.run instead of glusterfs.started.

Without this patch older salt minions will throw the following error:
```
An exception occurred in this state: Traceback (most recent call last):
File "/usr/lib/python2.7/dist-packages/salt/state.py", line 1628, in call
  **cdata['kwargs'])
File "/usr/lib/python2.7/dist-packages/salt/loader.py", line 1494, in wrapper
  return f(*args, **kwargs)
File "/usr/lib/python2.7/dist-packages/salt/states/glusterfs.py", line 209, in started
  if isinstance(__salt__['glusterfs.status'](name), dict):
File "/usr/lib/python2.7/dist-packages/salt/modules/glusterfs.py", line 315, in status
  root = _gluster_xml('volume status {0}'.format(name))
File "/usr/lib/python2.7/dist-packages/salt/modules/glusterfs.py", line 86, in _gluster_xml
  raise CommandExecutionError(root.find('opErrstr').text)
```

Original code came from GitHub user @AlexPostID. Modified by @Samos123
to use force_compatibility flag, fix issue of hardcoded keystone-keys
and use unless such that result won't show changed if the volume wassuch
that result won't show changed if the volume was already started.

Co-Author: Aleksei Shishkin(AlexPostID)