RFR: 8248261: Add timestamps to jpackage and jpackage tests verbose output

[alexander . matveev]

Please review the jpackage fix for bug [1] at [2].

Added timestamp to verbose and test output in form of [HH:mm:ss.SSS].

[1] https://bugs.openjdk.java.net/browse/JDK-8248261
[2] http://cr.openjdk.java.net/~almatvee/8248261/webrev.00/

Thanks,
Alexander