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/FlowsListCommand.java b/cli/src/main/java/org/onosproject/cli/net/FlowsListCommand.java
index 7cbd586..c417ddc 100644
--- a/cli/src/main/java/org/onosproject/cli/net/FlowsListCommand.java
+++ b/cli/src/main/java/org/onosproject/cli/net/FlowsListCommand.java
@@ -163,7 +163,7 @@
             try {
                 response = br.readLine();
                 response = response.trim().replace("\n", "");
-                if (response.equals("y")) {
+                if ("y".equals(response)) {
                     flowService.removeFlowRules(flow);
                 }
             } catch (IOException e) {