[hibernate-dev] replace Pax Exam with Docker

<tired-rant> I'm fed up with Pax Exam and would love to replace it as the hibernate-osgi integration test harness.  Most of the Karaf committers I've been working with hate it more than I do.  Every single time we upgrade the Karaf version, something less-than-minor in hibernate-osgi, upgrade/change dependencies, or attempt to upgrade Pax Exam itself, there's some new obfuscated failure.  And no matter how much I pray, it refuses to let us get to the container logs to figure out what happened.  Tis a house of cards. </tired-rant> One alternative that recently came up elsewhere: use Docker to bootstrap the container, hit it with our features.xml, install a test bundle that exposes functionality externally (over HTTP, Karaf commands, etc), then hit the endpoints and run assertions. Pros: true "integration test", plain vanilla Karaf, direct access to all logs, easier to eventually support and test other containers. Cons: Need Docker installed for local test runs, probably safer to isolate the integration test behind a disabled-by-default Maven profile. Any gut reactions? OSGi is fun and I'm not at all bitter, -Brett- ;)