RFR: 8366342: Key generator and key pair generator tests skipping, but showing as passed

[Mikhail Yankelevich]

* Minor cleanup
* Key generator and key pair generator tests skipping, but showing as passed:
   * test/jdk/sun/security/pkcs11/KeyGenerator/DESParity.java
   * test/jdk/sun/security/pkcs11/KeyGenerator/TestAES.java
   * test/jdk/sun/security/pkcs11/KeyGenerator/TestChaCha20.java
   * test/jdk/sun/security/pkcs11/KeyGenerator/TestKeyGenerator.java
   * test/jdk/sun/security/pkcs11/KeyPairGenerator/TestDH2048.java
   * test/jdk/sun/security/pkcs11/KeyPairGenerator/TestDefaultDHPrivateExpSize.java

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Commit messages:
 - JDK-8366342: Key generator and key pair generator tests skipping, but showing as passed

Changes: https://git.openjdk.org/jdk/pull/26985/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=26985&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8366342
  Stats: 35 lines in 6 files changed: 11 ins; 9 del; 15 mod
  Patch: https://git.openjdk.org/jdk/pull/26985.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/26985/head:pull/26985

PR: https://git.openjdk.org/jdk/pull/26985