RFR: 8340493: Fix some Asserts failure messages [v2]

[Weijun Wang]

> `Asserts.assertNotEquals` shows "expected 12345 to not equal 12345" which sounds redundant, just say "expected not equals but was 12345".
> 
> `Asserts.assertEqualsByteArray` uses the words "expected... to equal...". Modify it to follow the `assertEquals` style ""expected... but was...".

Weijun Wang 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 8340493
 - rename to expected, unexpected, and actual
 - the fix

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/21101/files
  - new: https://git.openjdk.org/jdk/pull/21101/files/96696a09..5c5c2a3a

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=21101&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=21101&range=00-01

  Stats: 799550 lines in 10314 files changed: 516390 ins; 222605 del; 60555 mod
  Patch: https://git.openjdk.org/jdk/pull/21101.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21101/head:pull/21101

PR: https://git.openjdk.org/jdk/pull/21101