Refactor: Use descriptive methods when comparing Timestamps

Change-Id: I938f1db98c3d6868da73b5f3e8e01e7a787260c1
diff --git a/core/api/src/main/java/org/onosproject/net/intent/IntentData.java b/core/api/src/main/java/org/onosproject/net/intent/IntentData.java
index 63ce928..b70e7cc 100644
--- a/core/api/src/main/java/org/onosproject/net/intent/IntentData.java
+++ b/core/api/src/main/java/org/onosproject/net/intent/IntentData.java
@@ -191,9 +191,9 @@
 
         if (currentData == null) {
             return true;
-        } else if (currentData.version().compareTo(newData.version()) < 0) {
+        } else if (currentData.version().isOlderThan(newData.version())) {
             return true;
-        } else if (currentData.version().compareTo(newData.version()) > 0) {
+        } else if (currentData.version().isNewerThan(newData.version())) {
             return false;
         }