[jdk11u-dev] RFR: 8203238: [TESTBUG] rewrite MemOptions shell test in Java

[Goetz Lindenmaier]

I backport this for parity with 11.0.16-oracle.

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Commit messages:
 - Backport 1ad4834807cb8f10bbc1a1b7435bf322f2e0e7d5

Changes: https://git.openjdk.java.net/jdk11u-dev/pull/1028/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=1028&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8203238
  Stats: 400 lines in 5 files changed: 128 ins; 272 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk11u-dev/pull/1028.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk11u-dev pull/1028/head:pull/1028

PR: https://git.openjdk.java.net/jdk11u-dev/pull/1028