Introduces Virtual Circuit functionality for SDX-L2

Changes:
- Implements commands: sdxl2vc, sdxl2vc-add, sdxl2vc-list, sdxl2vc-remove
- Custom exceptions handled at the VC manager
- Updated README
- Updated unit tests
- Grouped some documentation and code
- Reduced checkstyle warnings

Change-Id: I4cb211dcfd1f3517f4e594c1cc1c816f9c3cdbe3
diff --git a/sdx-l2/src/main/java/org/onosproject/sdxl2/cli/completer/SdxL2NameCompleter.java b/sdx-l2/src/main/java/org/onosproject/sdxl2/cli/completer/SdxL2NameCompleter.java
index 50b4366..df31856 100644
--- a/sdx-l2/src/main/java/org/onosproject/sdxl2/cli/completer/SdxL2NameCompleter.java
+++ b/sdx-l2/src/main/java/org/onosproject/sdxl2/cli/completer/SdxL2NameCompleter.java
@@ -24,7 +24,7 @@
 import java.util.List;
 
 /**
- * Completes SDX-L2 names.
+ * Completes name for SDX-L2.
  */
 public class SdxL2NameCompleter implements Completer {