Increase the stability of DTLS test CipherSuite.java

Test, javax/net/ssl/DTLS/CipherSuite.java, failed in nightly regression intermittent.

command: main CipherSuite TLS_DHE_DSS_WITH_AES_128_GCM_SHA256
reason: User specified action: run main/othervm CipherSuite TLS_DHE_DSS_WITH_AES_128_GCM_SHA256
elapsed time (seconds): 60.42
----------System.out:(18/1179)----------
java.lang.RuntimeException: Too much loops to produce handshake packets
at DTLSOverDatagram.handshake(DTLSOverDatagram.java:153)
at DTLSOverDatagram.doClientSide(DTLSOverDatagram.java:116)
at DTLSOverDatagram$ClientCallable.call(DTLSOverDatagram.java:549)
at DTLSOverDatagram$ClientCallable.call(DTLSOverDatagram.java:539)
at java.util.concurrent.FutureTask.run(FutureTask.java:265)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
java.lang.Exception: Not ready for application data yet
at DTLSOverDatagram.handshake(DTLSOverDatagram.java:225)
at DTLSOverDatagram.doServerSide(DTLSOverDatagram.java:94)
at DTLSOverDatagram$ServerCallable.call(DTLSOverDatagram.java:515)
at DTLSOverDatagram$ServerCallable.call(DTLSOverDatagram.java:505)
at java.util.concurrent.FutureTask.run(FutureTask.java:265)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
----------System.err:(36/2367)----------
java.util.concurrent.ExecutionException: java.lang.RuntimeException: Too much loops to produce handshake packets
at java.util.concurrent.FutureTask.report(FutureTask.java:122)
at java.util.concurrent.FutureTask.get(FutureTask.java:192)
at DTLSOverDatagram.runTest(DTLSOverDatagram.java:488)
at CipherSuite.main(CipherSuite.java:62)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:502)
at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:92)
at java.lang.Thread.run(Thread.java:745)
Suppressed: java.util.concurrent.ExecutionException: java.lang.Exception: Not ready for application data yet
... 10 more
Caused by: java.lang.Exception: Not ready for application data yet
at DTLSOverDatagram.handshake(DTLSOverDatagram.java:225)
at DTLSOverDatagram.doServerSide(DTLSOverDatagram.java:94)
at DTLSOverDatagram$ServerCallable.call(DTLSOverDatagram.java:515)
at DTLSOverDatagram$ServerCallable.call(DTLSOverDatagram.java:505)
at java.util.concurrent.FutureTask.run(FutureTask.java:265)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
... 1 more
Caused by: java.lang.RuntimeException: Too much loops to produce handshake packets
at DTLSOverDatagram.handshake(DTLSOverDatagram.java:153)
at DTLSOverDatagram.doClientSide(DTLSOverDatagram.java:116)
at DTLSOverDatagram$ClientCallable.call(DTLSOverDatagram.java:549)
at DTLSOverDatagram$ClientCallable.call(DTLSOverDatagram.java:539)
at java.util.concurrent.FutureTask.run(FutureTask.java:265)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
... 1 more

JavaTest Message: Test threw exception: java.util.concurrent.ExecutionException: java.lang.RuntimeException: Too much loops to produce handshake packets
JavaTest Message: shutting down test