RFR 8143923 :DatagramSocket and MulticastSocket supportedOptions set depends on call order

Hi All, Please review the below code change. Bug : JDK-8143923 DatagramSocket and MulticastSocket supportedOptions set depends on call order Webrev : http://cr.openjdk.java.net/~vtewari/8143923/webrev0.0/index.html

JDK 9 RFR of JDK-8157499: Mark several tests from jdk_net as intermittently failing

Below tests are known to fail intermittently. This patch is to mark the test accordingly with keyword 'intermittent’ until issue resolved. java/net/MulticastSocket/TestInterfaces.java (JDK-8134989) java/net/DatagramSocket/PortUnreachable.java (JDK-8085875) java/net/InetAddress/IsReachableViaLoop