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

Change-Id: I0a1aea4bdb5d305c50273e6ff749fe71bd2a295a
diff --git a/drivers/default/src/main/java/org/onosproject/driver/pipeline/CentecV350Pipeline.java b/drivers/default/src/main/java/org/onosproject/driver/pipeline/CentecV350Pipeline.java
index 183d997..414a0ca 100644
--- a/drivers/default/src/main/java/org/onosproject/driver/pipeline/CentecV350Pipeline.java
+++ b/drivers/default/src/main/java/org/onosproject/driver/pipeline/CentecV350Pipeline.java
@@ -602,7 +602,7 @@
                     .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;
diff --git a/drivers/default/src/main/java/org/onosproject/driver/pipeline/DefaultSingleTablePipeline.java b/drivers/default/src/main/java/org/onosproject/driver/pipeline/DefaultSingleTablePipeline.java
index eca9014..a004fde 100644
--- a/drivers/default/src/main/java/org/onosproject/driver/pipeline/DefaultSingleTablePipeline.java
+++ b/drivers/default/src/main/java/org/onosproject/driver/pipeline/DefaultSingleTablePipeline.java
@@ -114,7 +114,7 @@
 
         TrafficSelector.Builder selector = DefaultTrafficSelector.builder();
 
-        filter.conditions().stream().forEach(selector::add);
+        filter.conditions().forEach(selector::add);
 
         if (filter.key() != null) {
             selector.add(filter.key());
diff --git a/drivers/default/src/main/java/org/onosproject/driver/pipeline/Ofdpa2GroupHandler.java b/drivers/default/src/main/java/org/onosproject/driver/pipeline/Ofdpa2GroupHandler.java
index 80d8332..03f2996 100644
--- a/drivers/default/src/main/java/org/onosproject/driver/pipeline/Ofdpa2GroupHandler.java
+++ b/drivers/default/src/main/java/org/onosproject/driver/pipeline/Ofdpa2GroupHandler.java
@@ -1099,7 +1099,7 @@
                     .collect(Collectors.toSet());
             keys.addAll(otherkeys);
 
-            keys.stream().forEach(key ->
+            keys.forEach(key ->
                     processPendingAddGroupsOrNextObjs(key, false));
         }
     }
diff --git a/drivers/default/src/main/java/org/onosproject/driver/pipeline/SpringOpenTTP.java b/drivers/default/src/main/java/org/onosproject/driver/pipeline/SpringOpenTTP.java
index ca50df8..b391606 100644
--- a/drivers/default/src/main/java/org/onosproject/driver/pipeline/SpringOpenTTP.java
+++ b/drivers/default/src/main/java/org/onosproject/driver/pipeline/SpringOpenTTP.java
@@ -1158,23 +1158,22 @@
                     .filter(key -> groupService.getGroup(deviceId, key) != null)
                     .collect(Collectors.toSet());
 
-            keys.stream()
-                    .forEach(key -> {
-                                 NextObjective obj = pendingGroups
-                                         .getIfPresent(key);
-                                 if (obj == null) {
-                                     return;
-                                 }
-                                 log.debug("Group verified: dev:{} gid:{} <<->> nextId:{}",
-                                           deviceId,
-                                           groupService.getGroup(deviceId, key).id(),
-                                           obj.id());
-                                 pass(obj);
-                                 pendingGroups.invalidate(key);
-                                 flowObjectiveStore.putNextGroup(
-                                                        obj.id(),
-                                                        new SpringOpenGroup(key, null));
-                    });
+            keys.forEach(key -> {
+                NextObjective obj = pendingGroups
+                        .getIfPresent(key);
+                if (obj == null) {
+                    return;
+                }
+                log.debug("Group verified: dev:{} gid:{} <<->> nextId:{}",
+                        deviceId,
+                        groupService.getGroup(deviceId, key).id(),
+                        obj.id());
+                pass(obj);
+                pendingGroups.invalidate(key);
+                flowObjectiveStore.putNextGroup(
+                        obj.id(),
+                        new SpringOpenGroup(key, null));
+            });
 
             if (!pendingGroups.asMap().isEmpty()) {
                 // Periodically execute only if entry remains in pendingGroups.