Bug#768566: [pylint-plugin-utils] Updating version of the package for RFS

[Joseph Herlant <herlantj@gmail.com>]

* Package name    : pylint-plugin-utils
  Version         : 0.2.3
  Upstream Author : Carl Crowder <emailme@carlcrowder.com>
* URL             : https://github.com/landscapeio/pylint-plugin-utils
* License         : GPL 2
  Programming Lang: Python
  Description     : Utilities and helpers for writing Pylint plugins.

 This is not a direct Pylint plugin, but rather a set of tools
 and functions used by other plugins such as pylint-django
 and pylint-celery.

Updated mentors version to the latest upstream release