RFR: 8172366: Support SHA-3 based signatures

[Valerie Peng]

Could someone please help review this RFE?

Enhance default JDK providers except SunPKCS11 with signatures using SHA-3 family of digests. SunPKCS11 provider will
be updated separately (JDK-8242332).

This changes covers SUN, SunRsaSign, and SunEC providers. Changes are straightforward, just add SHA-3 digests to
various signature algorithms.

Please review the corresponding CSR as well. It's at: https://bugs.openjdk.java.net/browse/JDK-8252260

Thanks!
Valerie

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Commit messages:
 - 8172366: Support SHA-3 based signatures

Changes: https://git.openjdk.java.net/jdk/pull/102/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=102&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8172366
  Stats: 613 lines in 20 files changed: 541 ins; 8 del; 64 mod
  Patch: https://git.openjdk.java.net/jdk/pull/102.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/102/head:pull/102

PR: https://git.openjdk.java.net/jdk/pull/102