hg: jdk/jdk11: 8205687: TimeoutHandler generates huge core files

[igor.ignatyev at oracle.com]

Changeset: 79e86b32d7e2
Author:    iignatyev
Date:      2018-08-13 13:44 -0700
URL:       http://hg.openjdk.java.net/jdk/jdk11/rev/79e86b32d7e2

8205687: TimeoutHandler generates huge core files
Summary: use kill instead of gcore to generate core file
Reviewed-by: dholmes

! test/failure_handler/src/share/classes/jdk/test/failurehandler/GathererFactory.java
! test/failure_handler/src/share/classes/jdk/test/failurehandler/ToolKit.java
! test/failure_handler/src/share/conf/linux.properties
! test/failure_handler/src/share/conf/mac.properties
! test/failure_handler/src/share/conf/solaris.properties