Description of problem:
When you create a Start Task of type "message", or a ServiceTask, but don't set the "message", or "interface/operation" properties respectively, when you re-open the process, the default values for these properties are shown in the UI, even though they're not sensible values.

Version-Release number of selected component (if applicable):
bpms-6.1.0-DR4

How reproducible:

Steps to Reproduce:
1. Create a new BP
2. Remove the start task
3. Add a new Message Start Task
4. Add a Service Task
5. At this point, the 'message' property of the Start Task and 'interface' and 'operation' properties of the Service Task are empty
6. Save the BP
7. Close the BP
8. Re-open the BP
9. Now the 'message' property of the Start Task and 'interface' and 'operation' properties of the Service Task show the defalut values, which are dummy values.

Actual results:
Default values for properties are shown.

Expected results:
Empty property values should be shown.

Additional info: