RFR(S): 8073718: Cleanup test output and skip creating mini dumps for hotspot/test/runtime/Safepoint/Assert* tests

[Stefan Sarne]

Hi all,

Please review and sponsor this fix.

Bug: https://bugs.openjdk.java.net/browse/JDK-8073718
Webrev: http://cr.openjdk.java.net/~sla/stefan/8073718/webrev.00/
<http://cr.openjdk.java.net/%7Esla/stefan/8073718/webrev.00/>
The hotspot/test/runtime/Safepoint/Assert* tests crash the vm and checks 
the output in the hs_err files for assert messages.
To save some time and space (especially upload time) the minidump 
creation should be avoided.

This change adds the vm argument -XX:-CreateMinidumpOnCrash to the 
command line.

Thanks,
Stefan