Release version 8.0.5-GA

Merge pull request Tencent#23 from Tencent/dev

Update to 8u272

FEAT(gc): Backport 8166607: G1 needs klass_or_null_acquire

--task=7498361

JDK-issue: 8166607

FEAT(gc): reclaim unused internal and Java heap memory when vm is idle

add a new thread and check vm load every 5 minutes, when load is below
thresold times, will trigger full gc to reclaim physical memory, the
feature is disable by default.

--story=857362553

Contributed-by:wattsun

FIX(*): modify some test cases to pass jtreg

Modify three test cases to pass jtreg.
Revert JDK-8028623 which didn't work for aarch64.

Co-authors:
Co-authored-by: Daisyq Huang<[email protected]>
Co-authored-by: Buddy Liao<[email protected]>

CHORE(version): update version to 8.0.1

Update version info.

Co-authored-by: Daisyq Huang<[email protected]> Lin Zang <[email protected]>

FEAT(*): add README