LP 1497307: Fix 2.8.4 to 2.9.0 upgrade script.

LP 1497307: Fix 2.8.4 to 2.9.0 upgrade script.

Chris Sharp noticed another ERROR: cannot ALTER TABLE
"record_attr_definition" because it has pending trigger events
with the 2.8.4 to 2.9.0 upgrade script.  I have rearranged the
transactions so that there are now 3.

1. One for the initial inserts and other changes up to 0937.

2. One for the two alter table statements in 0937.

3. One for 0938 to the end (0944).

This resolves the issue and works for me on an upgrade from a
clean 2.8.4 installation.

Signed-off-by: Jason Stephenson <jstephenson@mvlc.org>