RFR 8162752: keytool -importkeystore should probe srcstoretype if not specified

Hi All Please review the fix at http://cr.openjdk.java.net/~weijun/8162752/webrev.00/ for 8162752: keytool -importkeystore should probe srcstoretype if not specified https://bugs.openjdk.java.net/browse/JDK-8162752 Keytool uses 1 flag to manage 2 options, 2 is better. Thanks Max

Re: [9] RFR: 8159416: javax/net/ssl/DTLS/CipherSuite.java failed on timeout

Hi Xuelei, I updated CustomDatagramSocketImpl class to be able to drop some packets randomly or by specified numbers. While updating the test, I found https://bugs.openjdk.java.net/browse/JDK-8161086 which I think is the root cause of these intermittent failures. I added a couple of Packet