RFR: 8292068: Convert ModuleEntryTable into ResourceHashtable

[Coleen Phillimore]

Converted the ModuleEntryTable to use ResourceHashtable.
Ran tiers 1-7.  Also ran performance tests with this and other changes with no performance difference, although the footprint of this should be better.

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Commit messages:
 - 8292068: Convert ModuleEntryTable into ResourceHashtable

Changes: https://git.openjdk.org/jdk/pull/9809/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=9809&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8292068
  Stats: 366 lines in 8 files changed: 108 ins; 182 del; 76 mod
  Patch: https://git.openjdk.org/jdk/pull/9809.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/9809/head:pull/9809

PR: https://git.openjdk.org/jdk/pull/9809