Disable TestGerritPatch.

It's broken after the migration to gerrit-on-borg.

BUG=chromium:280409
TEST=Relesae waterfall builders pass unit tests

Change-Id: I1b7ff55f34d1990c6b51e8961d859cc7e51a6153
Reviewed-on: https://chromium-review.googlesource.com/167411
Reviewed-by: Stefan Zager <szager@chromium.org>
Tested-by: Stefan Zager <szager@chromium.org>
diff --git a/lib/patch_unittest.py b/lib/patch_unittest.py
index 15bcd33..9181d17 100755
--- a/lib/patch_unittest.py
+++ b/lib/patch_unittest.py
@@ -12,6 +12,7 @@
 import shutil
 import sys
 import time
+import unittest
 
 sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.dirname(
     os.path.abspath(__file__)))))
@@ -466,6 +467,7 @@
                       msg="Couldn't find %s in %s" % (element, str_rep))
 
 
+@unittest.skip('Broken after migration to gerrit-on-borg')
 class TestGerritPatch(TestGitRepoPatch):
 
   has_native_change_id = True