Extend existing DTO classes from DTOObject, added run execution and get execution status
Cancel report executions method, add exception class for ReportExecution service
ReportExecutions: cancel, search, get details. Added abstract createFromJSON method to DTOObject. Added more RE service DTO objects.
Search results return array, added ReportExecution\Parameter, DTO Exception created
Change 204 response handling to not throw exceptions. Fix a serialization issue with Parameters
move Export to Export subnamespace