RFR: 8401: Remove weak cipher usages in JMC Secure Store

[Suchita Chaturvedi]

Using stronger cipher algorithms and getting rid of weak cipher algorithms.

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Commit messages:
 - 8401: Remove weak cipher usages in JMC Secure Store

Changes: https://git.openjdk.org/jmc/pull/651/files
  Webrev: https://webrevs.openjdk.org/?repo=jmc&pr=651&range=00
  Issue: https://bugs.openjdk.org/browse/JMC-8401
  Stats: 110 lines in 2 files changed: 79 ins; 26 del; 5 mod
  Patch: https://git.openjdk.org/jmc/pull/651.diff
  Fetch: git fetch https://git.openjdk.org/jmc.git pull/651/head:pull/651

PR: https://git.openjdk.org/jmc/pull/651