RFR: 8304069: ClassFileParser has ad-hoc hashtables [v5]

[Matias Saavedra Silva]

> The ClassFileParser has ad-hoc hash tables for checking for duplicate names for fields, methods and interfaces. ResourceHashtable will now be used instead. Verified with tier1-4 tests.

Matias Saavedra Silva has updated the pull request incrementally with one additional commit since the last revision:

  Removed default constructor and changed declarations

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Changes:
  - all: https://git.openjdk.org/jdk/pull/13141/files
  - new: https://git.openjdk.org/jdk/pull/13141/files/20a2006a..2c89b165

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=13141&range=04
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=13141&range=03-04

  Stats: 7 lines in 1 file changed: 0 ins; 4 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/13141.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/13141/head:pull/13141

PR: https://git.openjdk.org/jdk/pull/13141