RFR: 8292218: Convert PackageEntryTable to ResourceHashtable [v2]

[Coleen Phillimore]

> This is the conversion of the PackageEntryTable, which is stored one per ClassLoaderData to ResourceHashtable.  Much like the module table and uses the Module_lock.
> Tested with tier1-3 on linux, windows, mac.

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

  Fix debug info and module name comparison.

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Changes:
  - all: https://git.openjdk.org/jdk/pull/9837/files
  - new: https://git.openjdk.org/jdk/pull/9837/files/ebb1e95a..b813b6c9

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=9837&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=9837&range=00-01

  Stats: 3 lines in 1 file changed: 0 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/9837.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/9837/head:pull/9837

PR: https://git.openjdk.org/jdk/pull/9837