[8u60] Request for approval for 8062552: Support keystore type detection for JKS and PKCS12 keystores

[Vincent Ryan]

Please approve the following 8u-only fix:

Bug: https://bugs.openjdk.java.net/browse/JDK-8062552
Webrev: http://cr.openjdk.java.net/~vinnie/8062552/webrev.02/
Review: http://mail.openjdk.java.net/pipermail/security-dev/2015-May/012176.html