ganeti-noded: reduce log noise

The source port/addr is currently logged three times for each
connection, and this is unnecessary. We change two log entries to debug,
since they are useful for precise timing, and we keep only one at INFO
level.

Reviewed-by: imsnah

lib/http/server.py

@@ -253,7 +253,7 @@ class _HttpServerRequestExecutor(object):
     # Operate in non-blocking mode
     self.sock.setblocking(0)
 
-    logging.info("Connection from %s:%s", client_addr[0], client_addr[1])
+    logging.debug("Connection from %s:%s", client_addr[0], client_addr[1])
     try:
       request_msg_reader = None
       force_close = True
@@ -286,7 +286,7 @@ class _HttpServerRequestExecutor(object):
       self.sock.close()
       self.sock = None
     finally:
-      logging.info("Disconnected %s:%s", client_addr[0], client_addr[1])
+      logging.debug("Disconnected %s:%s", client_addr[0], client_addr[1])
 
   def _ReadRequest(self):
     """Reads a request sent by client.