Use correct label casing in tests

This cleans up the casing in the tests and removes the temporary
translation table in the base test class.

Change-Id: I7a9aff57de3699ca1689fa147c6fcdea677e16fd
diff --git a/tests/unit/test_webapp.py b/tests/unit/test_webapp.py
index da027c1..5b6950b 100644
--- a/tests/unit/test_webapp.py
+++ b/tests/unit/test_webapp.py
@@ -31,11 +31,11 @@
         super(TestWebapp, self).setUp()
         self.executor_server.hold_jobs_in_build = True
         A = self.fake_gerrit.addFakeChange('org/project', 'master', 'A')
-        A.addApproval('code-review', 2)
-        self.fake_gerrit.addEvent(A.addApproval('approved', 1))
+        A.addApproval('Code-Review', 2)
+        self.fake_gerrit.addEvent(A.addApproval('Approved', 1))
         B = self.fake_gerrit.addFakeChange('org/project1', 'master', 'B')
-        B.addApproval('code-review', 2)
-        self.fake_gerrit.addEvent(B.addApproval('approved', 1))
+        B.addApproval('Code-Review', 2)
+        self.fake_gerrit.addEvent(B.addApproval('Approved', 1))
         self.waitUntilSettled()
         self.port = self.webapp.server.socket.getsockname()[1]