Set defaultServerOptions port to -1 for random

Updated some tests based on this change but also missing defer
connection close or server shutdown.

Fixed how the OCSP run go routine would shutdown, which would
never complete because grWG was not decremented by this go routine
prior to invoking s.Shutdown()

Signed-off-by: Ivan Kozlovic <ivan@synadia.com>

test/norace_test.go

@@ -393,7 +393,7 @@ func TestNoRaceQueueSubWeightOrderMultipleConnections(t *testing.T) {
 			<-start
 			// Now create 100 identical queue subscribers on each connection.
 			for i := 0; i < 100; i++ {
-				if _, err := nc.QueueSubscribeSync("foo", "bar"); err != nil {
+				if _, err := nc.QueueSubscribe("foo", "bar", func(_ *nats.Msg) {}); err != nil {
 					return
 				}
 			}