RFR: JDK-8036611: Cleanup of handling of properties and other java resources in the build

[Erik Joelsson]

Hello,

Here is a rather big patch that mainly cleans up build logic for 
properties files and other java resources. For a complete list of what 
was done, please see the bug.

Bug: https://bugs.openjdk.java.net/browse/JDK-8036611

Webrev: http://cr.openjdk.java.net/~erikj/8036611/webrev.01/

/Erik