hg: jdk/submit: 8216563: [TESTBUG] Change stressTime to default to 30 for nsk tests (part 2)

[harold.seigel at oracle.com]

Changeset: c58de85b30d2
Author:    hseigel
Date:      2019-01-15 14:55 -0500
URL:       http://hg.openjdk.java.net/jdk/submit/rev/c58de85b30d2

8216563: [TESTBUG] Change stressTime to default to 30 for nsk tests (part 2)
Summary: Change the default from 60 seconds to 30 seconds.
Reviewed-by: coleenp, mseledtsov

! test/hotspot/jtreg/vmTestbase/nsk/share/test/StressOptions.java
! test/hotspot/jtreg/vmTestbase/vm/runtime/defmeth/README
! test/hotspot/jtreg/vmTestbase/vm/share/options/package-info.java