RFR: 8266571: Sequenced Collections [v5]

[Stuart Marks]

> PR for Sequenced Collections implementation.

Stuart Marks has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 80 commits:

 - Merge branch 'master' into JDK-8266571-SequencedCollections
 - Simplify handling of cached keySet, values, and entrySet views.
 - Merge branch 'master' into JDK-8266571-SequencedCollections
 - Update copyrights.
 - More specification tweaks.
 - Add simple overrides to ArrayList.
 - Specification cleanups.
 - Update spec of CopyOnWriteArrayList::reversed.
 - Move AbstractViewCollection to AbstractMap.ViewCollection to avoid exposing it publicly.
 - Merge branch 'master' into JDK-8266571-SequencedCollections
   Resolve conflict by deleting IdentityLinkedList.java
 - ... and 70 more: https://git.openjdk.org/jdk/compare/76cda9f4...1332c3e2

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

Changes: https://git.openjdk.org/jdk/pull/7387/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=7387&range=04
  Stats: 6644 lines in 39 files changed: 6509 ins; 11 del; 124 mod
  Patch: https://git.openjdk.org/jdk/pull/7387.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/7387/head:pull/7387

PR: https://git.openjdk.org/jdk/pull/7387