RFR: JDK-8266527 RandomTestCoverage.java failing due to API removal

[Jim Laskey]

RandomTestCoverage.java was overlooked when doing local test. Apologies.

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Commit messages:
 - Adjust testing for API removal

Changes: https://git.openjdk.java.net/jdk/pull/3867/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=3867&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8266527
  Stats: 15 lines in 1 file changed: 5 ins; 0 del; 10 mod
  Patch: https://git.openjdk.java.net/jdk/pull/3867.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/3867/head:pull/3867

PR: https://git.openjdk.java.net/jdk/pull/3867