Standardize the sys.path fix up and fix a few pylint warnings.

tests/trychange_unittest.py

Index: tests/trychange_unittest.py
diff --git a/tests/trychange_unittest.py b/tests/trychange_unittest.py
index 12157fdc867c2452efc0d8f989f0ddb1bc5cc694..c7330e13d1fc9384d2bfa315c96a4edd2df41885 100755
--- a/tests/trychange_unittest.py
+++ b/tests/trychange_unittest.py
@@ -5,9 +5,11 @@
 
 """Unit tests for trychange.py."""
 
-# pylint: disable=E1103,W0403
+import os
+import sys
+
+sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
 
-# Fixes include path.
 from super_mox import SuperMoxTestBase
 
 import subprocess2
@@ -91,6 +93,7 @@ class GITUnittest(TryChangeTestsBase):
     self.compareMembers(trychange.GIT, members)
 
   def testBasic(self):
+    # pylint: disable=E1103
     trychange.os.path.abspath(self.fake_root).AndReturn(self.fake_root)
     trychange.scm.GIT.GetCheckoutRoot(self.fake_root).AndReturn(self.fake_root)
     trychange.scm.GIT.GetUpstreamBranch(self.fake_root).AndReturn('somewhere')