Changed mount.mount module to accept only the mount point.
Changed mount.mount module to accept only the mount point.

- Previously the mount.mount needs at least the device and the mount
  point. Using this approach it doesn't use the /etc/fstab entries.
- Change to needs only the mount point.
- You still can use the device, but now is an optional parameter.

saltstack/salt,saltstack/salt,saltstack/salt,saltstack/salt,saltstack/salt