Added node['afw']['disable_cleanup'] attribute support to prevent automatic rule cleanup on the chef server.
Disable cleanup attribute name changed to enable_rules_cleanup and boolean value used. Per pull request comment: https://github.com/Technicolor-Portico/AFW/commit/61aa39927ca46a24eb8c9b5a205419f6652fe3e3#commitcomment-3282978.
Merge pull request #13 from Technicolor-Portico/master

Preventing auto cleanup of the rules