RFR: 8185127: Add Tests to cover hashCode() method for java supported crypto key types.

[Sibabrata Sahoo]

This is a simple Test to add few additional API coverage for all java supported key types. The objective of this Test is to cover equals() and hashcode() methods for each key types.

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Commit messages:
 - 8185127: Add Tests to cover hashCode() method for java supported crypto key types.

Changes: https://git.openjdk.java.net/jdk/pull/3490/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=3490&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8185127
  Stats: 153 lines in 1 file changed: 153 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/3490.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/3490/head:pull/3490

PR: https://git.openjdk.java.net/jdk/pull/3490