Add a sqlite config option to the aio option of fdo-admin-cli

[7flying]

The user should be able to specify that they want a sqlite database as the storage method when running the servers with fdo-admin-cli aio

The tool should automatically create the sqlite databases and store them in <aio-dir>/stores/.

The user should still manually export the OVs from the manufacturing server's DB and then import them into the owner server's DB.

[nullr0ute]

Maybe we should add a "backend" option and have sqlite/files as the options and default to sqlite

[7flying]

Once sqlite has been enabled in aio, other features that depend on database support, such as the re-registration window of OVs in the owner server should also be configured.