RFR: 8283082: sun.security.x509.X509CertImpl.delete("x509.info.validity") nulls out info field [v4]

[Jayashree Huttanagoudar]

> Could you please review the changes?
> This is to address the issue: https://bugs.openjdk.org/browse/JDK-8283082?jql=labels%20%3D%20starter-bug

Jayashree Huttanagoudar has updated the pull request incrementally with one additional commit since the last revision:

  Address review comment to polish regression test.
  - Verified the newly added test case before and after the patch.

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Changes:
  - all: https://git.openjdk.org/jdk/pull/9306/files
  - new: https://git.openjdk.org/jdk/pull/9306/files/5d89e9b0..fcafa9d0

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=9306&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=9306&range=02-03

  Stats: 32 lines in 1 file changed: 32 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/9306.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/9306/head:pull/9306

PR: https://git.openjdk.org/jdk/pull/9306