[jdk11u-dev] RFR: 8229338: clean up test/jdk/java/util/RandomAccess/Basic.java

[Goetz Lindenmaier]

I backport this for parity with 11.0.20-oracle.

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Commit messages:
 - Backport 0364ad244a95154be20b6399a04d7a847356ffa0

Changes: https://git.openjdk.org/jdk11u-dev/pull/1956/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=1956&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8229338
  Stats: 179 lines in 1 file changed: 86 ins; 49 del; 44 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/1956.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/1956/head:pull/1956

PR: https://git.openjdk.org/jdk11u-dev/pull/1956