Arquillian Managed container should fail if a server on same management port is found

The Managed container should not reuse a already started server if found on the same configuration, that's what the Remote container is for.

This is for security reasons to avoid running the test suite against a potential harmful environment. (e.g. manipulating the wrong server env backend data base etc)

The isServerStarted check should be replaced with a simple URL ping to avoid the 5 sec wait timeout in the Management API client.