GalaxyWorkflow.ensureWorkflowIsOnServer unit test
- added a unit test for the GalaxyWorkflow.ensureWorkflowIsOnServer method.
- let the GalaxyWorkflow.ensureWorkflowIsOnServer method return a result.
- split off the GalaxyWorkflow.isWorkflowOnServer method from the GalaxyWorkflow.ensureWorkflowIsOnServer method.
- added an example input file for the RemoveTopAndLeft workflow.