[8] code review for 8007755: Support the logical grouping of keystores

[Vincent Ryan]

Please review this final component of JEP-166 that adds support
for logical keystores and introduces a new keystore type called
DKS, the domain keystore.

The purpose of the domain keystore is to simplify the handling of
multiple keystores and truststores for applications and to ease
their deployment.

Webrev: http://cr.openjdk.java.net/~vinnie/8007755/webrev.00/

Thanks.