jcr2vfs: update timed snapshot version in sh/bat scripts
jcr2vfs: add SessionInfo @Producer
jcr2vfs: add logback-test.xml that logs into console
jcr2vfs: fix migration app execution directly from code and reenable tests

 * main() is not used from tests as it calls System.exit() which surefire does not like
 * tests now use method run() that just throws exception