[11u] RFR: 8211727: Adjust default concurrency settings for running tests on Sparc

[Severin Gehwolf]

Hi,

Please review this dependency patch of a bug I'd like to backport (JDK-
8214003). It does not apply cleanly - due to JDK-8212028 missing in
jdk11u[1], but the changes needed are quite trivial:

1)
JTREG_TIMEOUT_FACTOR => JTREG_TIMEOUT

2)
test/hotspot/jtreg/compiler/jsr292/ContinuousCallSiteTargetChange.java
change omitted since the test in JDK 11u does not have /timeout=300.

Bug: https://bugs.openjdk.java.net/browse/JDK-8211727
webrev: http://cr.openjdk.java.net/~sgehwolf/webrevs/JDK-8211727/jdk11/01/webrev/
Original change: http://hg.openjdk.java.net/jdk/jdk/rev/6b05634db714

Tested this on Linux x86_64 tier1 and verified timeout continues to be
set at 4. Tests on sparc would be welcome.

Thoughts?

Thanks,
Severin

[1] 8212028: Use run-test makefile framework for testing in
    Oracle's Mach5. Quite a big change. Does not seem suitable for
    JDK 11u.