RFR: 8292892: Javadoc index descriptions are not deterministic [v2]

[John Neffenger]

> Please review these changes to the Javadoc index builders. This pull request adds 423 missing entries to the index of the JDK API Specification, corrects their package names in the member search index, and makes their descriptions deterministic. I'll follow up with more information in a separate comment.

John Neffenger has updated the pull request incrementally with one additional commit since the last revision:

  Rename test class members and rewrite its comments

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/10070/files
  - new: https://git.openjdk.org/jdk/pull/10070/files/5e1b3dfc..2be48216

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=10070&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=10070&range=00-01

  Stats: 36 lines in 3 files changed: 8 ins; 0 del; 28 mod
  Patch: https://git.openjdk.org/jdk/pull/10070.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10070/head:pull/10070

PR: https://git.openjdk.org/jdk/pull/10070