RFR: 8047723: @since tag cleanup in jaxp

[Henry Jen]

Hi,

Please review a trivial webrev for jdk9/jaxp that do the same @since tag 
normalization as in jdk9/jdk.

http://cr.openjdk.java.net/~henryjen/jdk9/8047723/0/webrev/

I am not sure if there is another mailing list thatis more appropriate 
for this, if so, please direct me to the right ml. Thanks.

Cheers,
Henry