[8u-dev] Request for Review + Request for Approval for Backport 8049171: Additional tests for jarsigner's warnings

[Svetlana Nikandrova]

Hello,

please review and approve the backport of tests enhancement:
Original tests from
https://bugs.openjdk.java.net/browse/JDK-8049171
jdk 9 review: 
http://mail.openjdk.java.net/pipermail/core-libs-dev/2015-January/031006.html
jdk 9 changeset: http://hg.openjdk.java.net/jdk9/dev/jdk/rev/5c61ccd9c162
Originally reviewed by Max Wang

Webrev:
http://cr.openjdk.java.net/~snikandrova/8049171/webrev.00/ 
<http://cr.openjdk.java.net/%7Esnikandrova/8049171/webrev.00/>

List of changes between original patch and current webrev:

1) No ProcessTools.java changes as they have been backported earlier.
2) JarUtils.java : private method transferToOutputStream instead 
ofInputStream's transferTo method (present since 9).
3) TimestampCheck.java - changes applied by hand to omit 
System.getProperty("test.tool.vm.opts") that is not used in jdk 8 testing
4) Used System.getProperty("test.jdk") instead of 
System.getProperty("java.home")

Tested with JPRT.

Thank you,
Svetlana