I've copied JdbcConnectionAccessImpl into Hibernate Search as it's part of the Hibernate ORM testsuite, not distributed in the Maven repositories.

It would be nice if this utility was distributed as end users might benefit from it (and Search too); there seem to be more interesting utilities in that same package.

A simple fix would be to distribute these as "test jar", an alternative would be to move these to hibernate-testing.
Or to merge the 'hibernate-testing' back into the hibernate tests module.