Account for mysql, sqlite adapters in testing logic

[alassek]

MySQL is largely the same as postgres here, but sqlite requires some accomodation.

There are two ways to use sqlite:

1. sqlite::memory for an in-memory database
2. sqlite:///app/config/bookshelf_dev.db for a filename

We will ignore in-memory databases and apply the standard renaming logic to the basename of the database filenames, preserving the extname.

hanami/hanami#1395