hg: jdk/jdk: 8220774: Add HandshakeALot diag option

[robbin.ehn at oracle.com]

Changeset: 16999bd91ba6
Author:    rehn
Date:      2019-03-26 12:08 +0100
URL:       http://hg.openjdk.java.net/jdk/jdk/rev/16999bd91ba6

8220774: Add HandshakeALot diag option
Reviewed-by: dcubed, dholmes

! src/hotspot/share/runtime/globals.hpp
! src/hotspot/share/runtime/thread.cpp
! src/hotspot/share/runtime/thread.hpp
! src/hotspot/share/runtime/vmThread.cpp
! src/hotspot/share/runtime/vmThread.hpp
! test/hotspot/jtreg/ProblemList.txt
! test/hotspot/jtreg/runtime/Thread/SuspendAtExit.java
+ test/hotspot/jtreg/runtime/handshake/HandshakeSuspendExitTest.java
! test/hotspot/jtreg/runtime/handshake/HandshakeTransitionTest.java
- test/hotspot/jtreg/runtime/handshake/HandshakeWalkSuspendExitTest.java