Make queueReconnect protected so subclasses can request reconnects.

In fixing JCBC-53 on the Couchbase Java client, a need to queue
reconnections in some cluster configuration updates was found to be
required.  This change allows that.

Change-Id: I25ce3945b4e5e6527dd680031237be22faed69ee
Reviewed-on: http://review.couchbase.org/16335
Reviewed-by: Michael Wiederhold <mike@couchbase.com>
Tested-by: Michael Wiederhold <mike@couchbase.com>

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

@@ -501,7 +501,7 @@ static String dbgBuffer(ByteBuffer b, int size) {
     return sb.toString();
   }
 
-  private void queueReconnect(MemcachedNode qa) {
+  protected void queueReconnect(MemcachedNode qa) {
     if (!shutDown) {
       getLogger().warn("Closing, and reopening %s, attempt %d.", qa,
           qa.getReconnectCount());