bin/oq_create_db:
bin/oq_create_db:

Fixed some minor issues in setting up the `revision_info`, which was
interfering with smooth migrations using dbmaint.py.


Former-commit-id: 63b740723b336f2d7c96a169a24efb96ecbda104 [formerly fdce05d4433182b01c9ad144479813b1bafdb992] [formerly fdce05d4433182b01c9ad144479813b1bafdb992 [formerly 699bbbc82cea60d0ef01502ff1d0cde923e57964]]
Former-commit-id: ed9dbd6f3c9240ea8fb12dfb9d139f9bc40b00d7
Former-commit-id: 0dfb3ac7fc8276a19bb6c58c8616309e8054de11
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine