* Fixes NPE when no outputDir is set
* Fix behaviors of default values for values not provided by user
* Easier handling of default behavior in settings.
* Fixes for dynamic config deserialization (specifically, ruby client sample fix)
* Tests for WorkflowSettings (defaults, modified defaults, nulls)
* Test modification of WorkflowSettings defaults for both class constructor and builder
* add test cases to cover different collection format
* add space params to retrofit 1.x
* add space params to retrofit 2.x
* rename url to localVarUrl
* fix exception in haskell servant