Description of problem:
@41844/postgres

After the upgrade, there is no mapping in cms_section_template_map for
the MultiPartArticle. This results in MPAs using the default content
item template, which doesn't render it correctly; section links do not
work. See normal rickshaw vs. upgraded db below.


rickshaw=# select * from cms_section_template_map;
 mapping_id | section_id | type_id | template_id | use_context |
is_default
------------+------------+---------+-------------+-------------+------------
       1069 |         62 |    1063 |        1068 | public      | 1
(1 row)


upgrade=# select * from cms_section_template_map;
 mapping_id | section_id | type_id | template_id | use_context |
is_default
------------+------------+---------+-------------+-------------+------------
(0 rows)