2018.11.2, Forever Young

• Fixed parsing of MAC addresses.
• Using fixed GWNewDevice(Group)Request.
• Fixed broken device-accept due to nested transaction that is
  unsupported by the system.
• The deviceService is now configured to use cryptoConfig to
  encrypt/decrypt device properties.
• Fixed timeout in GWS tests.
• Minor documentation fixes related to format of access_level entry.
• Query devices.remove_unused now cascades into table device_properties.
  The query has been also optimized and protected against failures.