RFR: JDK-8296945: PublicMethodsTest is slow due to dependency verification with debug builds

[Matthias Baesken]

As discussed in https://bugs.openjdk.org/browse/JDK-8296945 , let us switch off VerifyDependencies  in this test because of slow machines when (fast)debug builds are used, the test sometimes times out after the [JDK-8266074](https://bugs.openjdk.org/browse/JDK-8266074) Vtable-based CHA implementation  implementation came in.
Same has been done for other tests with similar issues, see 8268227: java/foreign/TestUpcall.java still times out  .

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Commit messages:
 - JDK-8296945

Changes: https://git.openjdk.org/jdk/pull/11234/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=11234&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8296945
  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/11234.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/11234/head:pull/11234

PR: https://git.openjdk.org/jdk/pull/11234