git-cl: split GetRietveldServer from GetIssue

Should be no functional change.
Necessary for a follow-up change I'm making.

Review URL: http://codereview.chromium.org/9385017

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@121590 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/tests/git_cl_test.py b/tests/git_cl_test.py
index 56df006..2e50be2 100755
--- a/tests/git_cl_test.py
+++ b/tests/git_cl_test.py
@@ -155,9 +155,9 @@
          '.'],),
         'M\tPRESUBMIT.py'),
       ((['git', 'config', 'branch.working.rietveldissue'],), '12345'),
+      ((['git', 'config', 'branch.working.rietveldpatchset'],), '31137'),
       ((['git', 'config', 'branch.working.rietveldserver'],),
          'codereview.example.com'),
-      ((['git', 'config', 'branch.working.rietveldpatchset'],), '31137'),
       ((['git', 'config', 'user.email'],), 'author@example.com'),
       ((['git', 'config', 'rietveld.tree-status-url'],), ''),
   ]