[jdk11u-dev] RFR: 8183372: Refactor java/lang/Class shell tests to java

[Goetz Lindenmaier]

I backport this for parity with 11.0.17-oracle.

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Commit messages:
 - Backport 6dc3c6dcddcbcb3a1a93415d66f1d9595b217519

Changes: https://git.openjdk.java.net/jdk11u-dev/pull/1135/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=1135&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8183372
  Stats: 402 lines in 5 files changed: 151 ins; 212 del; 39 mod
  Patch: https://git.openjdk.java.net/jdk11u-dev/pull/1135.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk11u-dev pull/1135/head:pull/1135

PR: https://git.openjdk.java.net/jdk11u-dev/pull/1135