Use Collection#forEach() instead of Stream#forEach() for simplicity

Change-Id: I0a1aea4bdb5d305c50273e6ff749fe71bd2a295a
diff --git a/drivers/corsa/src/main/java/org/onosproject/drivers/corsa/AbstractCorsaPipeline.java b/drivers/corsa/src/main/java/org/onosproject/drivers/corsa/AbstractCorsaPipeline.java
index 8083c2b..2133db2 100644
--- a/drivers/corsa/src/main/java/org/onosproject/drivers/corsa/AbstractCorsaPipeline.java
+++ b/drivers/corsa/src/main/java/org/onosproject/drivers/corsa/AbstractCorsaPipeline.java
@@ -177,7 +177,7 @@
                     .filter(key -> groupService.getGroup(deviceId, key) != null)
                     .collect(Collectors.toSet());
 
-            keys.stream().forEach(key -> {
+            keys.forEach(key -> {
                 NextObjective obj = pendingGroups.getIfPresent(key);
                 if (obj == null) {
                     return;