Use the same coding style in toString() implementations

Change-Id: I116eb140d92b385d36efe120c42cd2fb3efac760
diff --git a/pcep/pcepio/src/main/java/org/onosproject/pcepio/types/StatefulRsvpErrorSpecTlv.java b/pcep/pcepio/src/main/java/org/onosproject/pcepio/types/StatefulRsvpErrorSpecTlv.java
index 0eba814..9e1a074 100644
--- a/pcep/pcepio/src/main/java/org/onosproject/pcepio/types/StatefulRsvpErrorSpecTlv.java
+++ b/pcep/pcepio/src/main/java/org/onosproject/pcepio/types/StatefulRsvpErrorSpecTlv.java
@@ -25,7 +25,6 @@
 import org.slf4j.LoggerFactory;
 
 import com.google.common.base.MoreObjects;
-import com.google.common.base.MoreObjects.ToStringHelper;
 
 /**
  * Provides StatefulRsvpErrorSpecTlv.
@@ -207,13 +206,11 @@
 
     @Override
     public String toString() {
-        ToStringHelper toStrHelper = MoreObjects.toStringHelper(getClass());
-
-        if (!isErrSpceObjSet) {
-            toStrHelper.add("Type", TYPE).add("Length", hLength);
-        } else {
-            toStrHelper.add("Type", TYPE).add("Length", hLength).add("RSVPErrorSpecObject", rsvpErrSpecObj);
-        }
-        return toStrHelper.toString();
+        return MoreObjects.toStringHelper(getClass())
+                .omitNullValues()
+                .add("Type", TYPE)
+                .add("Length", hLength)
+                .add("RSVPErrorSpecObject", rsvpErrSpecObj)
+                .toString();
     }
 }