RFR: 8342002: sun/security/tools/keytool/GenKeyPairSigner.java failed due to missing certificate output

[Weijun Wang]

Previous code change for [JDK-8340327](https://bugs.openjdk.org/browse/JDK-8340327) changed the display names for all keys with a `NamedParameterSpec` to be the parameter set name. This test is not updated.

I've filed an enhancement at [JDK-8342062](https://bugs.openjdk.org/browse/JDK-8342062) at a boarder scale on the keytool and jarsigner output messages.

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Commit messages:
 - the fix

Changes: https://git.openjdk.org/jdk/pull/21499/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=21499&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8342002
  Stats: 9 lines in 2 files changed: 0 ins; 2 del; 7 mod
  Patch: https://git.openjdk.org/jdk/pull/21499.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21499/head:pull/21499

PR: https://git.openjdk.org/jdk/pull/21499