[MiniFakeDns] Translate logging, reduce verbosity in INFO logs

BUG=11679
TEST=run any login test, see that Respuesta: lines no longer appear in .INFO logs upon test completion

Change-Id: Idabf72dc4d0ebd73c4245580b4b0e7fc06adc998

Review URL: http://codereview.chromium.org/6474028
diff --git a/src/miniFakeDns.py b/src/miniFakeDns.py
index f1358d8..04c08e5 100755
--- a/src/miniFakeDns.py
+++ b/src/miniFakeDns.py
@@ -1,6 +1,6 @@
 #!/usr/bin/python
 
-import socket, threading, time
+import logging, socket, threading, time
 
 class DNSQuery:
   TYPE = '\x00\x01'  # An 'A' record
@@ -76,14 +76,14 @@
     stopper.set()
     """
     self._udps.bind((self._address, self._port))
-    print 'miniFakeDns listening on port %d' % self._port
+    logging.info('miniFakeDns listening on port %d' % self._port)
     self._udps.settimeout(1)
     while not stop.is_set():
       try:
         data, addr = self._udps.recvfrom(1500)
         p=DNSQuery(data)
         self._udps.sendto(p.respuesta(self._fake_ip), addr)
-        print 'Respuesta: %s -> %s' % (p.dominio, self._fake_ip)
+        logging.debug('Response: %s -> %s' % (p.dominio, self._fake_ip))
       except socket.timeout:
         pass