[NO ISSUE][HYR][*DB] Minor refactoring / address SonarQube comments

Change-Id: Icf10b6df0fdc006675d8f0da6fd06d50200c6b6a
Reviewed-on: https://asterix-gerrit.ics.uci.edu/2098
Tested-by: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Contrib: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Integration-Tests: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Reviewed-by: Murtadha Hubail <mhubail@apache.org>
diff --git a/hyracks-fullstack/hyracks/hyracks-control/hyracks-control-common/src/main/java/org/apache/hyracks/control/common/config/ConfigManager.java b/hyracks-fullstack/hyracks/hyracks-control/hyracks-control-common/src/main/java/org/apache/hyracks/control/common/config/ConfigManager.java
index d13b5e6..67738ba 100644
--- a/hyracks-fullstack/hyracks/hyracks-control/hyracks-control-common/src/main/java/org/apache/hyracks/control/common/config/ConfigManager.java
+++ b/hyracks-fullstack/hyracks/hyracks-control/hyracks-control-common/src/main/java/org/apache/hyracks/control/common/config/ConfigManager.java
@@ -344,20 +344,20 @@
 
     private void applyDefaults() {
         LOGGER.fine("applying defaults");
-        for (Map.Entry<Section, Map<String, IOption>> entry : sectionMap.entrySet()) {
-            if (entry.getKey() == Section.NC) {
-                entry.getValue().values().forEach(option -> getNodeNames()
+        sectionMap.forEach((key, value) -> {
+            if (key == Section.NC) {
+                value.values().forEach(option -> getNodeNames()
                         .forEach(node -> getOrDefault(getNodeEffectiveMap(node), option, node)));
                 for (Map.Entry<String, Map<IOption, Object>> nodeMap : nodeSpecificMap.entrySet()) {
-                    entry.getValue().values()
+                    value.values()
                             .forEach(option -> getOrDefault(
                                     new CompositeMap<>(nodeMap.getValue(), definedMap, new NoOpMapMutator()), option,
                                     nodeMap.getKey()));
                 }
             } else {
-                entry.getValue().values().forEach(option -> getOrDefault(configurationMap, option, null));
+                value.values().forEach(option -> getOrDefault(configurationMap, option, null));
             }
-        }
+        });
     }
 
     private Object getOrDefault(Map<IOption, Object> map, IOption option, String nodeId) {
@@ -450,15 +450,13 @@
 
     public Ini toIni(boolean includeDefaults) {
         Ini ini = new Ini();
-        for (Map.Entry<IOption, Object> entry : (includeDefaults ? configurationMap : definedMap).entrySet()) {
-            if (entry.getValue() != null) {
-                final IOption option = entry.getKey();
-                ini.add(option.section().sectionName(), option.ini(), option.type().serializeToIni(entry.getValue()));
+        (includeDefaults ? configurationMap : definedMap).forEach((option, value) -> {
+            if (value != null) {
+                ini.add(option.section().sectionName(), option.ini(), option.type().serializeToIni(value));
             }
-        }
-        for (Map.Entry<String, Map<IOption, Object>> nodeMapEntry : nodeSpecificMap.entrySet()) {
-            String section = Section.NC.sectionName() + "/" + nodeMapEntry.getKey();
-            final Map<IOption, Object> nodeValueMap = nodeMapEntry.getValue();
+        });
+        nodeSpecificMap.forEach((key, nodeValueMap) -> {
+            String section = Section.NC.sectionName() + "/" + key;
             synchronized (nodeValueMap) {
                 for (Map.Entry<IOption, Object> entry : nodeValueMap.entrySet()) {
                     if (entry.getValue() != null) {
@@ -467,7 +465,7 @@
                     }
                 }
             }
-        }
+        });
         return ini;
     }