Bug-fix: Remove flows from voltha for deleted subscriber, even if sadis cannot
fetch information about the deleted subscriber.
- Added a cli command that details subscribers that have actually been programmed in the data plane
- Changed all cli commands to start with volt-* as all app cli commands should
- removed DeviceIdCompleter from the 'olts' cli command as it is not needed
- removed unused method, renamed another one, fixed some logs
- S-tags are no longer 'DeviceVlans', so changed variable name
9 files changed