CFY-1461 added log to REST service
Merge branch 'master' into CFY-1461-logs-in-rest-service
CFY-1461 modified 4** errors to be logged as 'info' instead of 'warning'; modified format for request/response logs; flake8 fixes
CFY-1461 added request-response linkage in logs by the request id
CFY-1461 rest service and gunicorn log paths are now set via parameters
Merge pull request #172 from cloudify-cosmo/CFY-1461-logs-in-rest-service

CFY 1461 logs in rest service