CLOUDIFY-2454 merged
CLOUDIFY-2454 lazy init context logger
Merge branch 'develop' into feature/CLOUDIFY-2454-python-logger

Conflicts:
	cloudify/celery.py
	cosmo/celery.py
CLOUDIFY-2454 added CloudifyContext mock
CLOUDIFY-2454 remove previous handlers when creating cloudify logging handler
Merge pull request #14 from CloudifySource/feature/CLOUDIFY-2454-python-logger

CLOUDIFY-2454-python-logger