[9] RFR 8038084: CertStore needs a way to add new CertStore types

[Valerie Peng]

Hi Sean,

Can you please review the following fix?
Besides the new API and provider, I have also updated 
LDAPCertStoreParameters to mention the new URICertStoreParameters class 
per your suggestions.

8038084: CertStore needs a way to add new CertStore types
Webrev: http://cr.openjdk.java.net/~valeriep/8038084/webrev.00/
CCC: http://ccc.us.oracle.com/8038084

Thanks,
Valerie