CLOUDIFY-2340 clean manager rest project to comply with flake8 checks
Merge branch 'develop' into feature/CLOUDIFY-2340-flake8

Conflicts:
	manager-rest/manager_rest/resources.py
CLOUDIFY-2340 install flake8
CLOUDIFY-2340 fix bad merge
CLOUDIFY-2340 fix flake8 violations after merge
Merge branch 'develop' into feature/CLOUDIFY-2340-flake8
Merge pull request #122 from CloudifySource/feature/CLOUDIFY-2340-flake8

Apply flake8 rules to manager-rest project
CLOUDIFY-2340 fix project for flake8
CLOUDIFY-2340 fix project for flake8
Merge pull request #123 from CloudifySource/feature/CLOUDIFY-2340-flake8

Apply flake8 changes to cosmo-manager/vagrant
CLOUDIFY-2340 apply flake8 needed changes
Merge pull request #124 from CloudifySource/feature/CLOUDIFY-2340-flake8

Apply flake8 changes to workflows project
CLOUDIFY-2335 added test for properties injection
merge with develop
CLOUDIFY-2335 if properties injection requires pass only it (and runtime properties) to the plugin