RFR: 8284780: Need methods to create pre-sized HashSet and LinkedHashSet [v4]

[XenoAmess]

> as title.

XenoAmess has refreshed the contents of this pull request, and previous commits have been removed. The incremental views will show differences compared to the previous content of the PR. The pull request contains two new commits since the last revision:

 - migrate HashSet usages
 - migrate LinkedHashSet usage

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/8302/files
  - new: https://git.openjdk.java.net/jdk/pull/8302/files/e052c34f..f051c1fa

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=8302&range=03
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=8302&range=02-03

  Stats: 3 lines in 2 files changed: 0 ins; 1 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk/pull/8302.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/8302/head:pull/8302

PR: https://git.openjdk.java.net/jdk/pull/8302