RFR: JDK-8177956 Add TEST_VM_OPTS as convenience for run-test arguments

Mon Nov 27 23:11:13 UTC 2017

 From the bug report:

A common scenario is adding vm arguments when running tests. While this 
can be accomplished by JTREG="VM_OPTIONS=-Xfoo", this is a lot to type 
for a common case. In the future, when gtest accepts vm arguments as 
well, a separate, similar but yet different GTEST="VM_OPTIONS=-Xfoo" 
would be needed.

A new "global" TEST_VM_OPTS=X should behave as if VM_OPTIONS=X were 
present on all applicable test framework option control variables.

My solution also adds a new "global" TEST_OPTS, where TEST_VM_OPTS=-Xfoo 
behaves identical to TEST_OPTS="VM_OPTIONS=-Xfoo", but which also allows 
other global settings. It also adds support for VM_OPTIONS to gtest, and 
it improves error resilience in gtest result parsing.

Bug: https://bugs.openjdk.java.net/browse/JDK-8177956
WebRev: http://cr.openjdk.java.net/~ihse/JDK-8177956-add-TEST_OPTS/webrev.01

/Magnus