RFR: 8278028: [test-library] Warnings cleanup of the test library [v2]

[Roger Riggs]

> Compilation warnings of the test library introduce noise in test output and should be addressed or suppressed. 
> Changes include:
>  - SuppressWarnings("deprecation") and SuppressWarnings("removal")
>  - Adding type parameters to Raw types
>  - Adding a hashCode method where equals was already present

Roger Riggs has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains three additional commits since the last revision:

 - Merge branch 'master' into 8278028-test-warning-cleanup
 - Update copyrights
 - 8278028: [test-library] Warnings cleanup of the test library

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

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/6638/files
  - new: https://git.openjdk.java.net/jdk/pull/6638/files/0f445b4a..b1bbdfc7

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=6638&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=6638&range=00-01

  Stats: 30109 lines in 1016 files changed: 21851 ins; 3569 del; 4689 mod
  Patch: https://git.openjdk.java.net/jdk/pull/6638.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/6638/head:pull/6638

PR: https://git.openjdk.java.net/jdk/pull/6638