Synergy enhancements
- serializer.py: improved serialization
- manager.py: Managers are now serializable
- command.py, shell.py: improved command shell by using the 'tabulate' module
- service.py: listManagers, startManager, stopManager and getManagerStatus methods now use the Managers serialization
- requirements.txt, test-requirements.txt: 'tabulate' module dependence added
- test_synergy.py, test_manager_abstract.py: updated unit tests
- setup.cfg: changed entry points
Change-Id: I657af749aa3fcb32c27b516c2b9f836c5ba0c690
3c33d51dd4