Bug-fix: Remove flows from voltha for deleted subscriber, even if sadis cannot
fetch information about the deleted subscriber.

Other changes:
      - 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

Change-Id: I7cfde850669ed5b581fbac3195f68da28c4514c3
diff --git a/app/src/main/java/org/opencord/olt/cli/SubscriberAddCommand.java b/app/src/main/java/org/opencord/olt/cli/SubscriberAddCommand.java
index d5fa0da..f6db81e 100644
--- a/app/src/main/java/org/opencord/olt/cli/SubscriberAddCommand.java
+++ b/app/src/main/java/org/opencord/olt/cli/SubscriberAddCommand.java
@@ -27,7 +27,7 @@
 /**
  * Adds a subscriber to an access device.
  */
-@Command(scope = "onos", name = "add-subscriber-access",
+@Command(scope = "onos", name = "volt-add-subscriber-access",
         description = "Adds a subscriber to an access device")
 public class SubscriberAddCommand extends AbstractShellCommand {