Use Objects.nonNull() to check if non-null

Change-Id: Ib32f56c1d53e4199592f457d04660228b7f437aa
diff --git a/drivers/src/main/java/org/onosproject/driver/pipeline/OVSCorsaPipeline.java b/drivers/src/main/java/org/onosproject/driver/pipeline/OVSCorsaPipeline.java
index 5a8c68c..46a360b 100644
--- a/drivers/src/main/java/org/onosproject/driver/pipeline/OVSCorsaPipeline.java
+++ b/drivers/src/main/java/org/onosproject/driver/pipeline/OVSCorsaPipeline.java
@@ -72,6 +72,7 @@
 
 import java.util.Collection;
 import java.util.Collections;
+import java.util.Objects;
 import java.util.Set;
 import java.util.concurrent.Executors;
 import java.util.concurrent.ScheduledExecutorService;
@@ -173,12 +174,12 @@
         switch (fwd.op()) {
             case ADD:
                 rules.stream()
-                        .filter(rule -> rule != null)
+                        .filter(Objects::nonNull)
                         .forEach(flowBuilder::add);
                 break;
             case REMOVE:
                 rules.stream()
-                        .filter(rule -> rule != null)
+                        .filter(Objects::nonNull)
                         .forEach(flowBuilder::remove);
                 break;
             default: