RFR 8057134: sun/management/jmxremote/startstop/JMXStartStopTest.java failing intermittently

[Jaroslav Bachorik]

Please, review this test change

Issue : https://bugs.openjdk.java.net/browse/JDK-8057134
Webrev: http://cr.openjdk.java.net/~jbachorik/8057134/webrev.02

Currently the test expects one of the following exception types when 
trying to connect to a port not being server by the management agent - 
NoSuchObjectException and ConnectException. However, under certain 
circumstances RMI might throw ConnectIOException or any other suiting 
subtype of RemoteException.

The solution is to check for the thrown exception being a subtype of 
RemoteException instead.

Thanks,

-JB-