CFY-644 initial work on simplified workflow api
Merge branch 'develop' into feature/CFY-644-workflow-api
CFY-644 update workflows
CFY-644 for travis
CFY-644 extract upload-deploy-execute logic of helper method in test env so that it can be used to execute workflows other than 'install'
CFY-783 improved cancel execution tests
CFY-644 add basic test for non graph workflow api
CFY-644 add test for simple api usage remote task failure
CFY-644 change task retries in tests
CFY-644 add test for both retry and and then success, and retry with no success
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-644 add test for retries with eventual success/failure for local workflow tasks
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