Added unit tests and some minor changes for ProxyArp.

Change-Id: I027919c331575ba57b3d342683d73e1c31284810
diff --git a/src/main/java/net/onrc/onos/apps/proxyarp/ProxyArpManager.java b/src/main/java/net/onrc/onos/apps/proxyarp/ProxyArpManager.java
index c1f80d8..f026745 100644
--- a/src/main/java/net/onrc/onos/apps/proxyarp/ProxyArpManager.java
+++ b/src/main/java/net/onrc/onos/apps/proxyarp/ProxyArpManager.java
@@ -260,14 +260,6 @@
         this.onosDeviceService = context.getServiceImpl(IOnosDeviceService.class);
         this.packetService = context.getServiceImpl(IPacketService.class);
 
-        Map<String, String> configOptions = context.getConfigParams(this);
-
-        try {
-            arpCleaningTimerPeriodConfig = Long.parseLong(configOptions.get("cleanupmsec"));
-        } catch (NumberFormatException e) {
-            log.debug("ArpCleaningTimerPeriod related config options were not set. Use default.");
-        }
-
         arpRequests = Multimaps.synchronizedSetMultimap(HashMultimap
                 .<InetAddress, ArpRequest>create());
     }
@@ -276,6 +268,12 @@
     public void startUp(FloodlightModuleContext context) {
         Map<String, String> configOptions = context.getConfigParams(this);
 
+        try {
+            arpCleaningTimerPeriodConfig = Long.parseLong(configOptions.get("cleanupmsec"));
+        } catch (NumberFormatException e) {
+            log.debug("ArpCleaningTimerPeriod related config options were not set. Use default.");
+        }
+
         Long agingmsec = null;
         try {
             agingmsec = Long.parseLong(configOptions.get("agingmsec"));
@@ -393,6 +391,7 @@
 
     @Override
     public void receive(Switch sw, Port inPort, Ethernet eth) {
+
         if (eth.getEtherType() == Ethernet.TYPE_ARP) {
             ARP arp = (ARP) eth.getPayload();
             learnArp(arp);
@@ -700,7 +699,7 @@
 
     @Override
     public List<String> getMappings() {
-        return new ArrayList<String>();
+        return  arpCache.getMappings();
     }
 
     private void sendArpReplyToWaitingRequesters(InetAddress address,
@@ -737,4 +736,12 @@
             arpCacheEventChannel.removeEntry(expireIp.toString());
         }
     }
+
+    public long getArpEntryTimeout() {
+        return arpCache.getArpEntryTimeout();
+    }
+
+    public long getArpCleaningTimerPeriod() {
+        return arpCleaningTimerPeriodConfig;
+    }
 }