RFR [JDK8]: 7160380 Sync JDK8 with JAXP 1.4.5

[Joe Wang]

This is a follow-up update on Kelly's change that dropped the jaxp 
source drop bundle process. With this update, the jaxp source in JDK8 
will be sync-ed with the current JAXP 1.4.5, and also JDK7u (the last 
change was 7151484).  Going forward, we'll follow the process to put any 
changes into JDK8 before 7ux.

webrev: http://cr.openjdk.java.net/~joehw/jdk8/7160380/webrev/
webrev for the change of package access: 
http://cr.openjdk.java.net/~joehw/jdk8/7160380/jdk/webrev/

Thanks,
Joe