first pass at loggable
Merge remote-tracking branch 'origin/dev' into jobqueue-logger
removing log() from BaseTask
inserted description
consolidating log messages, typehint in Loggable trait, fix phpdoc type for task id
Merge remote-tracking branch 'origin/dev' into jobqueue-logger

Conflicts:
	extensions/wikia/UserRenameTool/UserRenameTask.class.php
updating logging calls
pull request feedback
Merge pull request #3893 from Wikia/jobqueue-logger

Jobqueue logger