Revert "aodh: use database-url for gnocchi indexer"
Revert "aodh: use database-url for gnocchi indexer"

This reverts commit e99ad5a6a924a262d25afc06b8f5ae60c1269f37.

It does not work because there is a conflict with the Alembic table that share
the name. It needs a different database to work.

sileht/pifpaf,sileht/pifpaf,sileht/pifpaf,jd/pifpaf,jd/pifpaf