[autotest] Disable testbed in test push before testbed is restored

BUG=chromium:696061
TEST=unittest

Change-Id: Ida6a8a0a285bb0e3422d527cb57009cfb44c5d5a
Reviewed-on: https://chromium-review.googlesource.com/447116
Commit-Queue: Dan Shi <dshi@google.com>
Tested-by: Dan Shi <dshi@google.com>
Reviewed-by: Shuqian Zhao <shuqianz@chromium.org>
diff --git a/site_utils/test_push.py b/site_utils/test_push.py
index 2118c9e..490accb 100755
--- a/site_utils/test_push.py
+++ b/site_utils/test_push.py
@@ -611,16 +611,8 @@
         asynchronous_suite.daemon = True
         asynchronous_suite.start()
 
-        # Test suite for testbed
-        testbed_suite = multiprocessing.Process(
-                target=test_suite_wrapper,
-                args=(queue, TESTBED_SUITE, EXPECTED_TEST_RESULTS_TESTBED,
-                      arguments, False, False, True))
-        testbed_suite.daemon = use_daemon
-        testbed_suite.start()
-
         while (push_to_prod_suite.is_alive() or au_suite.is_alive() or
-               asynchronous_suite.is_alive() or testbed_suite.is_alive()):
+               asynchronous_suite.is_alive()):
             check_queue(queue)
             time.sleep(5)
 
@@ -629,7 +621,6 @@
         push_to_prod_suite.join()
         au_suite.join()
         asynchronous_suite.join()
-        testbed_suite.join()
 
         # All tests pass, push prod-next branch for UPDATED_REPOS.
         push_prod_next_branch(updated_repo_heads)