RFR: 8278028: [test-library] Warnings cleanup of the test library [v3]

[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 incrementally with one additional commit since the last revision:

  Remove a test/micro file added by mistake.

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/6638/files
  - new: https://git.openjdk.java.net/jdk/pull/6638/files/b1bbdfc7..895acede

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=6638&range=02
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=6638&range=01-02

  Stats: 129 lines in 1 file changed: 0 ins; 129 del; 0 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