CFY-783 improved cancel execution tests
CFY-849 added support for custom parameters; missing mandatory parameters will now all appear in the given error message rather than just the first one encountered; modified .travis.yml for tests
CFY-849 fixed test
CFY-846 moved 'force' param in Execute API from query param to body param
CFY-846 modified .travis.yml for tests
CFY-849 reverted .travis.yml
Merge pull request #64 from cloudify-cosmo/feature/CFY-849-add-parameter-for-specifying-if-custom-parameters-to-execution-is-allowed

CFY-849 added support for custom parameters; missing mandatory parameter...
Merge branch 'develop' into feature/CFY-783-cancel-workflow-feature
CFY-846 merge with develop
CFY-846 flake8 fix
CFY-846 reverted travis yml; removed unused code in resources.py
Merge pull request #65 from cloudify-cosmo/feature/CFY-846-force-parameter-in-Execute-API-should-be-in-body-rather-than-query

Feature/cfy 846 force parameter in execute api should be in body rather than query
Merge branch 'develop' into feature/CFY-783-cancel-workflow-feature
Merge pull request #63 from cloudify-cosmo/feature/CFY-783-cancel-workflow-feature

CFY-783 improved cancel execution tests
Merge branch 'develop' into feature/CFY-644-workflow-api

Conflicts:
	tests/mock_workflows/mock_workflows/workflows.py