[jdk11u-dev] RFR: 8212045: Add back the tests that were removed from HashesTest.java and AddExportsTest.java [v2]

[luchenlin]

> I backport this for parity with 11.0.20-oracle.

luchenlin 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 two additional commits since the last revision:

 - Merge branch 'openjdk:master' into andrewLu_backport_8212045
 - Backport 1226dcbcfe0d1c074d9b27c58d509bd73a138919

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

Changes:
  - all: https://git.openjdk.org/jdk11u-dev/pull/1899/files
  - new: https://git.openjdk.org/jdk11u-dev/pull/1899/files/d1e5c780..a00b947c

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=1899&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=1899&range=00-01

  Stats: 103 lines in 4 files changed: 59 ins; 19 del; 25 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/1899.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/1899/head:pull/1899

PR: https://git.openjdk.org/jdk11u-dev/pull/1899