RFR: 8191786: Thread-SMR hash table size should be dynamic [v2]

[Daniel D.Daugherty]

> Small change to switch Thread-SMR's hash table from ResourceHashtable to KVHashtable
> so that a variable sized hash table is used instead of a fixed size hash table (1031 elements).
> Also refactor common hash table size calculation code into static hash_table_size()
> function and call it from both places.
> 
> Test with Mach5 Tier[1-7] testing.

Daniel D. Daugherty has updated the pull request incrementally with one additional commit since the last revision:

  rehn CR

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

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/4168/files
  - new: https://git.openjdk.java.net/jdk/pull/4168/files/2ca28ada..0e4db022

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=4168&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=4168&range=00-01

  Stats: 12 lines in 2 files changed: 1 ins; 10 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/4168.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/4168/head:pull/4168

PR: https://git.openjdk.java.net/jdk/pull/4168