[8u20] Request for approval for bulk integration of hs25.20-b17

[Alejandro E Murillo]

Requesting approval to integrate hs25.20-b17 into jdk8u20-b17.

A webrev is available at:

http://cr.openjdk.java.net/~amurillo/8u20/hs25.20-b17-jdk8u20-b17.webrev/

Pre-integration testing is in progress; the integration will proceed
only after SQE has analyzed the results and approved.

The fixes in the proposed integration are below.  All have undergone
nightly testing and are already in a jdk9 repository.

8027230: Overflow in java.lang.instrument.Instrumentation.getObjectSize() method
8031475: Missing oopmap in patching stubs
8037112: gc/g1/TestHumongousAllocInitialMark.java caused SIGSEGV
8039042: G1: Phantom zeros in cardtable
8040245: G1: VM hangs during shutdown
8040803: G1: Concurrent mark hangs when mark stack overflows
8040804: G1: Concurrent mark stuck in loop calling os::elapsedVTime()
8043086: Hotspot is expected to report OOM which is occurred String.intern(), but crashes in JDK8u5
8043274: Test compiler/7184394/TestAESMain.java gets NPE on solaris
8043906: new hotspot build - hs25.20-b17
8044090: C1: Old value instead of new one is passed to post-barrier in UnsafeGetAndSetObject

-- 
Alejandro