CFY-785 removed source field from blueprint
CFY-785 remove blueprint source
CFY-807 get execution by id when validating installation of workers in rest service
Merge branch 'develop' into feature/CFY-785-remove-blueprint-source

Conflicts:
	rest-service/manager_rest/blueprints_manager.py
CFY-785 merge
CFY-785 merge
Merge pull request #55 from cloudify-cosmo/feature/CFY-785-remove-blueprint-source

Feature/cfy 785 remove blueprint source
Merge branch 'develop' into feature/CFY-799-task-retries