security tests leave JSSEServer running

After running the regression tests in agentvm mode there are several threads with stack traces such as the following remaining. The tests that use JSSEServer should be checked and should be fixed to shutdown the server at the end of the test. If this is not possible then those tests should be changed to run in othervm mode.

"Server" #42572 daemon prio=5 os_prio=0 tid=0x281cc400 nid=0xef0 runnable [0x382de000]
   java.lang.Thread.State: RUNNABLE
at java.net.DualStackPlainSocketImpl.accept0(Native Method)
at java.net.DualStackPlainSocketImpl.socketAccept(DualStackPlainSocketImpl.java:121)
at java.net.AbstractPlainSocketImpl.accept(AbstractPlainSocketImpl.java:404)
at java.net.PlainSocketImpl.accept(PlainSocketImpl.java:183)
- locked <0x12357ae8> (a java.net.SocksSocketImpl)
at java.net.ServerSocket.implAccept(ServerSocket.java:521)
at sun.security.ssl.SSLServerSocketImpl.accept(SSLServerSocketImpl.java:339)
at JSSEServer.run(JSSEServer.java:57)
at java.lang.Thread.run(Thread.java:722)