Added logging for autosize job & rspec matcher for cocaine logger

Use absolute count for logging spin-down instance counts

removed custom a_logger matcher, removed cocaine :logger arg
Merge branch 'eckhardt/add-logging-to-autosizeworkersjob' of github.com:djbkd/kochiku into eckhardt/add-logging-to-autosizeworkersjob

Conflicts:
	app/jobs/autosize_workers_job.rb