[JDK 9] RFR: 8041781: Need new regression tests for PBE keys

[Rajan Halade]

May I request you to review these 3 new tests to be added for PBE keys. 
New tests are added to address following:

- seal/unseal works correctly with PBE algorithms
- key wrapper works correctly with PBEKey
- SecretKeyFactory.translateKey() method works

JDK Issue: https://bugs.openjdk.java.net/browse/JDK-8041781
Webrev: http://cr.openjdk.java.net/~rhalade/8041781/webrev.00/

Thanks,
Rajan