RFR[12] JDK-8214937: sun/security/tools/jarsigner/warnings/NoTimestampTest.java failed due to unexpected expiration date

[sha.jiang at oracle.com]

Hi,
This test should determine the cert expiration date from the cert 
itself, but not try to calculate that date.

Issue: https://bugs.openjdk.java.net/browse/JDK-8214937
Webrev: http://cr.openjdk.java.net/~jjiang/8214937/webrev.00/

Best regards,
John Jiang