RFR: 8266642: improve ResolvedMethodTable hash function [v3]

[Denghui Dong]

> JDK-8249719 has fixed the bad hash function problem, however, the performance problem still exists when there are a large number of classes with the same name.
> Adding the address of the corresponding ClassLoaderData as a factor of hash can solve the problem.

Denghui Dong has updated the pull request incrementally with two additional commits since the last revision:

 - remove useless lines
 - use public api

-------------

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/3901/files
  - new: https://git.openjdk.java.net/jdk/pull/3901/files/8d500a84..82d8cc6c

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=3901&range=02
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=3901&range=01-02

  Stats: 5 lines in 1 file changed: 0 ins; 3 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk/pull/3901.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/3901/head:pull/3901

PR: https://git.openjdk.java.net/jdk/pull/3901