RFR: 8328785: IOException: Symbol not found: C_GetInterface for PKCS11 interface prior to V3.0 [v4]

[Valerie Peng]

> This PR fixes a problem regarding the usage of dlerror() where an earlier error message causes a premature error out. Added extra code to clear out earlier error message and made minor code refactoring.
> 
> No regression test as this can't be reproduced using the NSS library from artifactory and thus the noreg-hard label.
> 
> Thanks!

Valerie Peng has updated the pull request incrementally with one additional commit since the last revision:

  Address review comment from Weijun

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/18588/files
  - new: https://git.openjdk.org/jdk/pull/18588/files/65daabff..a2d9a5fa

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=18588&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=18588&range=02-03

  Stats: 7 lines in 1 file changed: 4 ins; 2 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/18588.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18588/head:pull/18588

PR: https://git.openjdk.org/jdk/pull/18588