tests: Add hack to test only a single storage driver
Fixes that LuaDBI being unavailable makes these produce nothing but
endless stack overflows in luarocks.
For full information on our dependencies, version requirements, and
where to find them, see https://prosody.im/doc/depends
If you have luarocks available on your platform, install the following:
- luaexpat
- luasocket
- luafilesystem
- luasec