RFR: 8180266: Convert sun/security/provider/KeyStore/DKSTest.sh to Java Jtreg Test

[Sibabrata Sahoo]

Convert sun/security/provider/KeyStore/DKSTest.sh to Java Jtreg Test.

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Commit messages:
 - 8180266: Convert sun/security/provider/KeyStore/DKSTest.sh to Java Jtreg Test

Changes: https://git.openjdk.org/jdk/pull/12257/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=12257&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8180266
  Stats: 103 lines in 3 files changed: 20 ins; 78 del; 5 mod
  Patch: https://git.openjdk.org/jdk/pull/12257.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/12257/head:pull/12257

PR: https://git.openjdk.org/jdk/pull/12257