RFR: 8157561 :Ship the unlimited policy files in JDK Updates

[Seán Coffey]

Looking to push this enhancement to jdk8u. The change introduces the new 
Security property which was brought into JDK 9 via JDK-8061842.

The code differs in that jar files continue to be used and backwards 
compatibility is maintained. If the new security property is not defined 
and the policy jar files exist in the legacy locations, then those jar 
files will continue to be honoured.

https://bugs.openjdk.java.net/browse/JDK-8157561
webrev : 
http://cr.openjdk.java.net/~coffeys/webrev.8157561.8u.jdk.v4/webrev/

-- 
Regards,
Sean.