Renamed the Pair.left and Pair.right fields to Pair.first and Pair.second

This is done for consistency with the C++ "std::pair" class template
from the STL (Standard Template Library).
diff --git a/src/main/java/net/onrc/onos/ofcontroller/flowmanager/FlowManager.java b/src/main/java/net/onrc/onos/ofcontroller/flowmanager/FlowManager.java
index 01cca31..9601ff9 100644
--- a/src/main/java/net/onrc/onos/ofcontroller/flowmanager/FlowManager.java
+++ b/src/main/java/net/onrc/onos/ofcontroller/flowmanager/FlowManager.java
@@ -416,8 +416,8 @@
 	// Process all entries
 	//
 	for (Pair<IOFSwitch, FlowEntry> entry : entries) {
-	    IOFSwitch sw = entry.left;
-	    FlowEntry flowEntry = entry.right;
+	    IOFSwitch sw = entry.first;
+	    FlowEntry flowEntry = entry.second;
 
 	    //
 	    // Mark the Flow Entry that it has been pushed to the switch
diff --git a/src/main/java/net/onrc/onos/ofcontroller/flowprogrammer/FlowPusher.java b/src/main/java/net/onrc/onos/ofcontroller/flowprogrammer/FlowPusher.java
index 853591a..c3c7107 100644
--- a/src/main/java/net/onrc/onos/ofcontroller/flowprogrammer/FlowPusher.java
+++ b/src/main/java/net/onrc/onos/ofcontroller/flowprogrammer/FlowPusher.java
@@ -458,7 +458,7 @@
 			new LinkedList<Pair<IOFSwitch, FlowEntry>>();
 
 		for (Pair<IOFSwitch, FlowEntry> entry : entries) {
-			if (add(entry.left, entry.right)) {
+			if (add(entry.first, entry.second)) {
 				pushedEntries.add(entry);
 			}
 		}
diff --git a/src/main/java/net/onrc/onos/ofcontroller/util/Pair.java b/src/main/java/net/onrc/onos/ofcontroller/util/Pair.java
index a617839..2245758 100644
--- a/src/main/java/net/onrc/onos/ofcontroller/util/Pair.java
+++ b/src/main/java/net/onrc/onos/ofcontroller/util/Pair.java
@@ -3,18 +3,18 @@
 /**
  * A generic class representing a pair of two values.
  */
-public class Pair<L, R> {
-    public L left;		// The first value in the pair
-    public R right;		// The second value in the pair
+public class Pair<F, S> {
+    public F first;		// The first value in the pair
+    public S second;		// The second value in the pair
 
     /**
      * Constructor for a pair of two values.
      *
-     * @param left the first value in the pair.
-     * @param right the second value in the pair.
+     * @param first the first value in the pair.
+     * @param second the second value in the pair.
      */
-    public Pair(L left, R right) {
-	this.left = left;
-	this.right = right;
+    public Pair(F first, S second) {
+	this.first = first;
+	this.second = second;
     }
 }