[8u] RFR(S) 8059036: Implement Diagnostic Commands for heap and finalizerinfo
May I please get a review of the following very simple backport of this
serviceability improvement to JDK 8?
The two hotspot jtreg test cases needed to be modified slightly because
of the lack of dcmd-specific test support in JDK 8's HS code base. The
only non-test difference from the JDK 9 changeset is modifying an
include directive (objArrayOop.inline.hpp -> objArrayOop.hpp) to
compensate for JDK-8072911.