The DB migration shouldn't populate types table

It is up to the system adminisator to do this via an API call.

Also fixes up a few cases of dict() being used rather than the prefered {}
(https://github.com/openstack-dev/hacking/blob/master/HACKING.rst#dictionarieslists)

Fixes bug: 1215962

Change-Id: I6b2eea0c03467b157ec147292dbea54e7f99006c
Merge "The DB migration shouldn't populate types table"