Refactor: Flip condition to reduce the depth of indentation

Change-Id: I572a989730a8dd93b5ab7ee63b37bc9d728c17e7

@@ -373,7 +373,10 @@ public class IntentManager
     private void applyIntentData(IntentData data,
     private void applyIntentData(IntentData data,
                                  FlowRuleOperations.Builder builder,
                                  FlowRuleOperations.Builder builder,
                                  Direction direction) {
                                  Direction direction) {
-        if (data != null) {
+        if (data == null) {
+            return;
+        }
+
         List<Intent> intentsToApply = data.installables();
         List<Intent> intentsToApply = data.installables();
         if (!intentsToApply.stream().allMatch(x -> x instanceof FlowRuleIntent)) {
         if (!intentsToApply.stream().allMatch(x -> x instanceof FlowRuleIntent)) {
             throw new IllegalStateException("installable intents must be FlowRuleIntent");
             throw new IllegalStateException("installable intents must be FlowRuleIntent");
@@ -405,7 +408,6 @@ public class IntentManager
                 rules.forEach(builder::remove);
                 rules.forEach(builder::remove);
             }
             }
         }
         }
-        }
 
 
     }
     }