autotest_quickmerge_unittest/gather_builder_stats_unittest: use cros_test_lib.TestCase

We don't want to use unittest.TestCase directly as our version handles a
lot of common issues (like stacked setUp/tearDown).

BUG=None
TEST=they still pass

Change-Id: Ic927811be410b669204608a961d714bfeb3fd80a
Reviewed-on: https://chromium-review.googlesource.com/233841
Reviewed-by: Aviv Keshet <akeshet@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
diff --git a/scripts/autotest_quickmerge_unittest.py b/scripts/autotest_quickmerge_unittest.py
index a093912..b69af4a 100755
--- a/scripts/autotest_quickmerge_unittest.py
+++ b/scripts/autotest_quickmerge_unittest.py
@@ -12,7 +12,6 @@
 import os
 import sys
 import types
-import unittest
 import mox
 
 
@@ -74,7 +73,7 @@
   u'/something/wicked/this/way/comes' : (u'dir',)
 }
 
-class ItemizeChangesFromRsyncOutput(unittest.TestCase):
+class ItemizeChangesFromRsyncOutput(cros_test_lib.TestCase):
   """Test autotest_quickmerge.ItemizeChangesFromRsyncOutput."""
 
   def testItemizeChangesFromRsyncOutput(self):
@@ -102,7 +101,7 @@
     self.assertEqual(expected_dir, set(report.new_directories))
 
 
-class PackageNameParsingTest(unittest.TestCase):
+class PackageNameParsingTest(cros_test_lib.TestCase):
   """Test autotest_quickmerge.GetStalePackageNames."""
 
   def testGetStalePackageNames(self):
@@ -188,7 +187,7 @@
 
     self.mox.VerifyAll()
 
-class PortageAPITest(unittest.TestCase):
+class PortageAPITest(cros_test_lib.TestCase):
   """Ensures that required portage API exists."""
   def runTest(self):
     try: