Fix rocky template

specs/rocky/rocky-template.rst should be a symlink, not a text file
containing the path to the actual template. This fixes the tests, and
also improves them to properly report errors when whole sections are
missing.

Change-Id: Ie95d45d134e8f332ecdecc687a68deb7af6c30c3

specs/rocky/rocky-template.rst

@@ -1 +0,0 @@
-../templates/rocky-template.rst

specs/rocky/rocky-template.rst

@@ -0,0 +1 @@
+../templates/rocky-template.rst

tests/test_titles.py

@@ -73,6 +73,8 @@ class TestTitles(testscenarios.WithScenarios, testtools.TestCase):
             msgs.append("Extra sections: %s" % extra_sections)
 
         for section in expect.keys():
+            if section not in actual:
+                continue
             missing_subsections = [x for x in expect[section]
                                    if x not in actual[section]]
             # extra subsections are allowed