RFR: 8266783: java\lang\reflect\Proxy\DefaultMethods.java fails with jtreg 6

[Mandy Chung]

Data provider with varargs does not work on TestNG 7.4.0.   Fix the test to create an object array instead of varargs to workaround this issue.

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Commit messages:
 - 8266783: java\lang\reflect\Proxy\DefaultMethods.java fails with jtreg 6

Changes: https://git.openjdk.java.net/jdk/pull/3984/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=3984&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8266783
  Stats: 7 lines in 1 file changed: 0 ins; 0 del; 7 mod
  Patch: https://git.openjdk.java.net/jdk/pull/3984.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/3984/head:pull/3984

PR: https://git.openjdk.java.net/jdk/pull/3984