[Telemetry] Rename page_test to legacy_page_test

telemetry/telemetry/benchmark_run_unittest.py

Index: telemetry/telemetry/benchmark_run_unittest.py
diff --git a/telemetry/telemetry/benchmark_run_unittest.py b/telemetry/telemetry/benchmark_run_unittest.py
index 215ee5d0f75345e5eb2391a0470ea4069ee67566..ab6b74166e9fc3727e8e0e7f873260c519c8ce16 100644
--- a/telemetry/telemetry/benchmark_run_unittest.py
+++ b/telemetry/telemetry/benchmark_run_unittest.py
@@ -6,14 +6,14 @@ import unittest
 
 from telemetry import benchmark as benchmark_module
 from telemetry import page as page_module
-from telemetry.page import page_test
+from telemetry.page import legacy_page_test
 from telemetry import story as story_module
 from telemetry.testing import fakes
 import mock
 
 
 # pylint: disable=abstract-method
-class DummyPageTest(page_test.PageTest):
+class DummyPageTest(legacy_page_test.LegacyPageTest):
   def __init__(self):
     super(DummyPageTest, self).__init__()
     # Without disabling the above warning, this complains that