RFR: 8270059: Remove KVHashtable [v2]

[Ioi Lam]

> There are now only 2 uses of KVHashtable in the HotSpot code. They can be easily rewritten to use ResourceHashtable and ResizeableResourceHashtable.

Ioi Lam has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains two additional commits since the last revision:

 - Merge branch 'master' of https://github.com/openjdk/jdk into 8270059-remove-kvhashtable
 - 8270059: Remove KVHashtable

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

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/4715/files
  - new: https://git.openjdk.java.net/jdk/pull/4715/files/78dc95d3..934e8347

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=4715&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=4715&range=00-01

  Stats: 2916 lines in 152 files changed: 1605 ins; 899 del; 412 mod
  Patch: https://git.openjdk.java.net/jdk/pull/4715.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/4715/head:pull/4715

PR: https://git.openjdk.java.net/jdk/pull/4715