[Telemetry] Move discover to common/py_utils

common/py_utils/py_utils/test_data/discoverable_classes/another_discover_dummyclass.py

 # Copyright 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """More dummy exception subclasses used by core/discover.py's unit tests."""
 
 # Import class instead of module explicitly so that inspect.getmembers() returns
 # two Exception subclasses in this current file.
 # Suppress complaints about unable to import class.  The directory path is
 # added at runtime by telemetry test runner.
 #pylint: disable=import-error
-from telemetry.internal.testing.discoverable_classes import discover_dummyclass
+from discoverable_classes import discover_dummyclass
 
 
 class _PrivateDummyException(discover_dummyclass.DummyException):
   def __init__(self):
     super(_PrivateDummyException, self).__init__()
 
 
 class DummyExceptionImpl1(_PrivateDummyException):
   def __init__(self):
     super(DummyExceptionImpl1, self).__init__()
 
 
 class DummyExceptionImpl2(_PrivateDummyException):
   def __init__(self):
     super(DummyExceptionImpl2, self).__init__()
 
 
 class DummyExceptionWithParameterImpl1(_PrivateDummyException):
   def __init__(self, parameter):
     super(DummyExceptionWithParameterImpl1, self).__init__()
     del parameter