Move alembic_reporter back to alembic

The standard folder for alembic migrations is just 'alembic', not
'alembic_reporter'. It was originally set up like this to allow for
multiple different alembic databases at the root level. Given that
this has since been moved into its own folder this is no longer
needed.

Change-Id: I819e678a356fc3bc3b4d6aca422d86722fe6cf1f
11 files changed