Do not interrupt LARS at shutdown or tasks might fail. See #3005
Shutting down the LARS test driver too early might fail one of the tests. See #3005
Use configured hostname instead of getHostName, see #2997

* getHostName may trigger reverse name lookup
* use the configured hostname in all places
Merge pull request #1104 from akka/wip-3005-LARS-shutdown-failure-ban

Do not interrupt LARS at shutdown or tasks might fail. See #3005
Merge pull request #1109 from akka/wip-2997-getHostName-patriknw

Use getHostAddress instead of getHostName, see #2997