RFR (JDK10/JAXP Doc-only) 8181047: Add comment to technical terms that shall not be translated

[huizhe wang]

Hi,

Please review a doc-only change that adds a few notes to message files 
that serves as a notification to translation teams that some technical 
terms shall not be translated.

JBS:
https://bugs.openjdk.java.net/browse/JDK-8181047
webres:
http://cr.openjdk.java.net/~joehw/jdk10/8181047/webrev/

Thanks,
Joe