BUG-1287: migrate programming-impl

-fixed config tests to use new md-sal configuration
-ProgrammingServiceImplTest uses AbstractDataBroker test instead of mocked DataBroker

Change-Id: I6b0b110c9a61253f8ab17b6ca9f7fb44bf218460
Signed-off-by: Robert Varga <rovarga@cisco.com>
Signed-off-by: Milos Fabian <milfabia@cisco.com>