RFR: 8263561: Re-examine uses of LinkedList [v2]

[Сергей Цыпанов]

> The usage of `LinkedList` is senseless and can be replaced with either `ArrayList` or `ArrayDeque` which are both more compact and effective.
> 
> jdk:tier1 and jdk:tier2 are both ok

Сергей Цыпанов 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 three new commits since the last revision:

 - 8263561: Use interface List instead of particular type where possible
 - 8263561: Rename requestList -> requests
 - 8263561: Re-examine uses of LinkedList

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

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/2744/files
  - new: https://git.openjdk.java.net/jdk/pull/2744/files/73029fe1..158006c6

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=2744&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=2744&range=00-01

  Stats: 17 lines in 2 files changed: 0 ins; 0 del; 17 mod
  Patch: https://git.openjdk.java.net/jdk/pull/2744.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/2744/head:pull/2744

PR: https://git.openjdk.java.net/jdk/pull/2744