[jdk11u-dev] RFR: 8293858: Change PKCS7 code to use default SecureRandom impl instead of SHA1PRNG

Fri Jun 16 11:59:13 UTC 2023

I backport this for parity with 11.0.20-oracle.

Had to resolve import and removal of class SecureRandomHolder that is placed differently.

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Commit messages:
 - Backport 2157145766f9789ade0940e9ae1715a3b74d508b

Changes: https://git.openjdk.org/jdk11u-dev/pull/1949/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=1949&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8293858
  Stats: 23 lines in 1 file changed: 1 ins; 19 del; 3 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/1949.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/1949/head:pull/1949

PR: https://git.openjdk.org/jdk11u-dev/pull/1949