Fix Sonar issue:

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

Change-Id: I4537e08936731ace55aeecb3ad941269ec1eb191
diff --git a/drivers/cisco/src/main/java/org/onosproject/drivers/cisco/TextBlockParserCisco.java b/drivers/cisco/src/main/java/org/onosproject/drivers/cisco/TextBlockParserCisco.java
index 2f533b5..b47411b 100644
--- a/drivers/cisco/src/main/java/org/onosproject/drivers/cisco/TextBlockParserCisco.java
+++ b/drivers/cisco/src/main/java/org/onosproject/drivers/cisco/TextBlockParserCisco.java
@@ -185,8 +185,8 @@
         long portSpeed = getPortSpeed(textStr);
         DefaultAnnotations.Builder annotations = DefaultAnnotations.builder()
                 .set(AnnotationKeys.PORT_NAME, firstWord);
-        return port.equals("-1") ? null : new DefaultPortDescription(PortNumber.portNumber(port),
-                                                                isEnabled, type, portSpeed, annotations.build());
+        return "-1".equals(port) ? null : new DefaultPortDescription(PortNumber.portNumber(port),
+                                                                     isEnabled, type, portSpeed, annotations.build());
     }
 
     /**