This reverts commit d10da8a9.

Or when running the tests on a computer thats not running sshd

When checking for a new install on MariaDB we need to upcase the
tablename when checking for the presence of the liquibase tables.

Fixes #5016 and adds tests to all the drivers with ssh tunnels that
implement their own can-connect?

* api/dataset/:id
* card/:id/query

i needed a way to have backpressure on the queue kill the request thread

We want to control when messages actually send to the client
beyond the timing available with the default buffer sized based
jetty implementation.