RFR (jaxp): JDK-8015630: Remove default restriction settings of jaxp 1.5 properties in JDK8

[huizhe wang]

Hi,

The default restriction in JDK8 is too strict. We've heard enough of 
complaints and decided to remove it. Below is the quick fix to remove 
the default restriction setting.

Also, there was a bug in XMLSchemaFactory's setFeature method where the 
access properties should be set only when secure processing is true.

webrevs:
http://cr.openjdk.java.net/~joehw/jdk8/8015630/webrev/

Tests pass after removing restriction check.

Thanks,
Joe