Fix Sonar issue:

Strings literals should be placed on the left side when checking for
equality

Change-Id: I4537e08936731ace55aeecb3ad941269ec1eb191
diff --git a/cli/src/main/java/org/onosproject/cli/net/RegionUpdateCommand.java b/cli/src/main/java/org/onosproject/cli/net/RegionUpdateCommand.java
index 7ea9ec6..f0887fa 100644
--- a/cli/src/main/java/org/onosproject/cli/net/RegionUpdateCommand.java
+++ b/cli/src/main/java/org/onosproject/cli/net/RegionUpdateCommand.java
@@ -78,7 +78,7 @@
         List<Set<NodeId>> masters = Lists.newArrayList();
         Set<NodeId> nodeIds = Sets.newHashSet();
         for (String masterArg : masterArgs) {
-            if (masterArg.equals("/")) {
+            if ("/".equals(masterArg)) {
                 masters.add(nodeIds);
                 nodeIds = Sets.newHashSet();
             } else {