RFR (JAXP) 8054632: [since-tag]: javadoc for xml classes has invalid @since tag

[huizhe wang]

Hi,

This patch applies similar change[1] made to the DOM sources under 
java.xml for those under jdk.xml.dom, replacing "@since DOM Level 2" 
with "@since 1.4, DOM Level 2", and adding "@since 1.4, DOM Level 2" to 
the ones (under html package) that missed the @since tag.

JBS: https://bugs.openjdk.java.net/browse/JDK-8054632
webrev: http://cr.openjdk.java.net/~joehw/jdk9/8054632/webrev/


[1] https://bugs.openjdk.java.net/browse/JDK-8047723

Thanks,
Joe