RFR: 8279254: PKCS9Attribute SigningTime always encoded in UTFTime

[Ben Perez]

Added single-argument `putTime` method to `DerOutputStream` that selects the correct encoding based on the `Date` value. Similarly, a `getTime` method was added to `DerValue` to automatically call the correct decoding function based on the date type specified by the `tag`. Furthermore, the `encode` method in `PKCS9Attribute` was changed to utilize the new `putTime` method.

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Commit messages:
 - removed unnecessary module in test
 - Fixed copyright in DerValue
 - Fixed copyright date
 - Added getTime method to DerValue that calls either getUTCTime or getGeneralizedTime depending on tag value. Added test
 - Added single argument  method to correctly encode time

Changes: https://git.openjdk.org/jdk/pull/14617/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=14617&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8279254
  Stats: 81 lines in 4 files changed: 77 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/14617.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/14617/head:pull/14617

PR: https://git.openjdk.org/jdk/pull/14617