CFY-1185 use plugin 'executor' field to determine task queue
CFY-1185 refactor _verify_task_registered for mocking purposes
CFY-1185 added workflows plugin to common
CFY-1185 added license
CFY-1185 fix flake
CFY-1185 merge workflwos code
CFY-1185 added option to pass logging level to setup_default_logger
CFY-1185 made create_message_prefix public
CFY-1185 filter out plugins that dont really need to be installed
CFY-1185 fix test
Merge pull request #51 from cloudify-cosmo/CFY-1185-remove-plugin-inheritance

Cfy 1185 remove plugin inheritance