Made an addOperation function private in MemcachedConnection

addOperation(MemcachedNode, Operation)

This function isn't used outside of MemcachedConnection and it is
the only one that doesn't put vbucket information into operations.
It is a helper function of the addOperation(String, Operation) call
so it doesn't need to add vbucket data but calling it from outside
the MemcachedClient scope could cause issues

Change-Id: I68fd4bb331fecf89655904396e825b0f42d7a17c
Reviewed-on: http://review.couchbase.org/7802
Reviewed-by: Michael Wiederhold <[email protected]>
Tested-by: Michael Wiederhold <[email protected]>

Author: Mike Wiederhold

src/main/java/net/spy/memcached/MemcachedConnection.java

@@ -753,7 +753,7 @@ public void insertOperation(final MemcachedNode node, final Operation o) {
 		getLogger().debug("Added %s to %s", o, node);
 	}
 
-	public void addOperation(final MemcachedNode node, final Operation o) {
+	private void addOperation(final MemcachedNode node, final Operation o) {
 		o.setHandlingNode(node);
 		o.initialize();
 		node.addOp(o);