CFY-883 wrote a system test for nodecellar app
Merge branch 'develop' into feature/CFY-883-write-system-test-for-nodecellar-app
CFY-883 flake8 fixes
CFY-883 flake8 fixes
Merge pull request #30 from cloudify-cosmo/feature/CFY-883-write-system-test-for-nodecellar-app

Feature/cfy 883 write system test for nodecellar app