Add tests to ProgramWorkflowService

ProgramWorkflowServiceImpl has untested branches or even entire methods.

Either check with your IDE or use coveralls to see what needs to be covered by new tests.

Add your tests to the following files:

• ProgramWorkflowServiceTest contains tests with an in memory DB
• ProgramWorkflowServiceUnitTest no in memory DB

see https://wiki.openmrs.org/display/docs/Unit+Testing+Conventions