Refactoring datastore package

Preparation to make datastore replacable
- Extract datastore interfaces
- Add multi Read/Write/Remove
- Add a method to walk over RCTable
- Refactor serialize/deserialize RCObject
- Localize dependency to JRAMCloud
  - Separate RAMCloud specific code into ramcloud package
  - Remove dependency to RAMCloud exception classes
  - Remove RC prefix from non RAMCloud specific code
- Cosmetics and update sample/test code

- reflect Naoki's comment
- more cosmetic fixes
  - reordered OPERATION enums

- removed no longer used code
- follow pmd, etc. where easily possible

Change-Id: I6f9153d705600447acf48a64f713c654c9f26713
diff --git a/src/main/java/net/onrc/onos/ofcontroller/networkgraph/web/RamcloudLinksResource.java b/src/main/java/net/onrc/onos/ofcontroller/networkgraph/web/RamcloudLinksResource.java
index abd1831..ad5059c 100644
--- a/src/main/java/net/onrc/onos/ofcontroller/networkgraph/web/RamcloudLinksResource.java
+++ b/src/main/java/net/onrc/onos/ofcontroller/networkgraph/web/RamcloudLinksResource.java
@@ -1,6 +1,6 @@
 package net.onrc.onos.ofcontroller.networkgraph.web;
 
-import net.onrc.onos.datastore.topology.RCLink;
+import net.onrc.onos.datastore.topology.KVLink;
 
 import org.restlet.resource.Get;
 import org.restlet.resource.ServerResource;
@@ -8,7 +8,7 @@
 public class RamcloudLinksResource extends ServerResource {
 
 	@Get("json")
-	public Iterable<RCLink> retrieve() {
-		return RCLink.getAllLinks();
+	public Iterable<KVLink> retrieve() {
+		return KVLink.getAllLinks();
 	}
 }