Change "ldap" to "username".

Change-Id: Ic993758ea901d039c5fdac978e516ba20f95005d
Reviewed-on: https://chromium-review.googlesource.com/830611
Reviewed-by: Andrii Shyshkalov <tandrii@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
diff --git a/tests/git_cl_test.py b/tests/git_cl_test.py
index 60f2930..06ccf5d 100755
--- a/tests/git_cl_test.py
+++ b/tests/git_cl_test.py
@@ -560,7 +560,8 @@
     # Specical case because we know there are no subdomains in chromium.org.
     self.assertEqual(self.c._parse_identity('git-note.period.chromium.org'),
                      ('note.period', 'chromium.org'))
-    # Pathological: .period. can be either ldap OR domain, more likely domain.
+    # Pathological: ".period." can be either username OR domain, more likely
+    # domain.
     self.assertEqual(self.c._parse_identity('git-note.period.example.com'),
                      ('note', 'period.example.com'))