RFR: 8292375: Convert ProtectionDomainCacheTable to ResourceHashtable [v2]

[Coleen Phillimore]

> Please review this simple conversion for the ProtectionDomainCacheTable from Old Hashtable to ResourceHashtable.  There are specific tests for this table in test/hotspot/jtreg/runtime/Dictionary and serviceability/dcmd/vm/DictionaryStatsTest.java.
> Also tested with tier1-7.

Coleen Phillimore has updated the pull request incrementally with one additional commit since the last revision:

  Cleanup things I just noticed.

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Changes:
  - all: https://git.openjdk.org/jdk/pull/10043/files
  - new: https://git.openjdk.org/jdk/pull/10043/files/20eeab38..1a817535

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=10043&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=10043&range=00-01

  Stats: 5 lines in 2 files changed: 0 ins; 4 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/10043.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10043/head:pull/10043

PR: https://git.openjdk.org/jdk/pull/10043