[jdk11u-dev] RFR: 8212045: Add back the tests that were removed from HashesTest.java and AddExportsTest.java [v3]

[luchenlin]

> I backport this for parity with 11.0.20-oracle.

luchenlin has updated the pull request incrementally with one additional commit since the last revision:

  Backport 1226dcbcfe0d1c074d9b27c58d509bd73a138919

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

Changes:
  - all: https://git.openjdk.org/jdk11u-dev/pull/1899/files
  - new: https://git.openjdk.org/jdk11u-dev/pull/1899/files/a00b947c..32b0800a

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=1899&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=1899&range=01-02

  Stats: 58 lines in 2 files changed: 0 ins; 56 del; 2 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