bin/oq_create_db:

Removed oqmif from table spaces. This is obsolete. The tables here should
be moved to `riski`.
db/models:

Moved all tables in `oqmif` namespace to `riski`.
db/schema:

Moved all oqmif tables to riski and removed oqmif namespace.
db/schema:

Cleaned up and updated copyright headers in DB schema files.
calcs/risk/hazard_getters:

s/oqmif/riski/g
db/routers:

Removed references to oqmif.
tests/db/routers_test:

s/oqmif/riski/g
tests/db/routers_test:

Fixed a broken test.