[Telemetry] Move from telemetry WaitFor to py_utils WaitFor

telemetry/telemetry/internal/forwarders/do_nothing_forwarder.py

Index: telemetry/telemetry/internal/forwarders/do_nothing_forwarder.py
diff --git a/telemetry/telemetry/internal/forwarders/do_nothing_forwarder.py b/telemetry/telemetry/internal/forwarders/do_nothing_forwarder.py
index d254cfbc049d82abe83c2ce4c55a6fc1db2024eb..40cfba3fc9943d2683a411591b8f2dbed3b7d821 100644
--- a/telemetry/telemetry/internal/forwarders/do_nothing_forwarder.py
+++ b/telemetry/telemetry/internal/forwarders/do_nothing_forwarder.py
@@ -6,10 +6,10 @@ import contextlib
 import logging
 import socket
 
-from telemetry.core import exceptions
-from telemetry.core import util
 from telemetry.internal import forwarders
 
+import py_utils
+
 
 class Error(Exception):
   """Base class for exceptions in this module."""
@@ -54,7 +54,7 @@ class DoNothingForwarder(forwarders.Forwarder):
       logging.debug(
           'Connection test succeeded for %s:%d',
           self.host_ip, self._port_pair.local_port)
-    except exceptions.TimeoutException:
+    except py_utils.TimeoutException:
       raise ConnectionError(
           'Unable to connect to address: %s:%d',
           self.host_ip, self._port_pair.local_port)
@@ -63,4 +63,4 @@ class DoNothingForwarder(forwarders.Forwarder):
     def CanConnect():
       with contextlib.closing(socket.socket()) as s:
         return s.connect_ex(address) == 0
-    util.WaitFor(CanConnect, timeout)
+    py_utils.WaitFor(CanConnect, timeout)