[jdk11u-dev] RFR: 8246383: NullPointerException in JceSecurity.getVerificationResult when using Entrust provider

[Lutz Schmidt]

This backport is a prerequisite to easily backport [JDK-8260274](https://bugs.openjdk.org/browse/JDK-8260274) (required for 11.0.20-oracle parity). The patch applies cleanly except for copyright header mismatches.

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Commit messages:
 - Backport 03f2ab325d30b74095f8abec8dbe09def27950c7

Changes: https://git.openjdk.org/jdk11u-dev/pull/1901/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=1901&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8246383
  Stats: 18 lines in 5 files changed: 1 ins; 3 del; 14 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/1901.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/1901/head:pull/1901

PR: https://git.openjdk.org/jdk11u-dev/pull/1901