RFR (JAXP) JDK-8087303 LSSerializer pretty print does not work anymore and JDK-8114834 LSSerializerImpl always serializes an entity reference node to" &entityName; " even if "entities" property is false

[Frank Yuan]

Hi all

Webrev http://cr.openjdk.java.net/~fyuan/8087303_8114834/webrev.00/ is for JDK-8087303 and JDK-8114834, I have to combine the fix
because there is some interaction between them.  
Bugs: https://bugs.openjdk.java.net/browse/JDK-8087303 https://bugs.openjdk.java.net/browse/JDK-8114834

Besides fixed some issues in xml serializer, I made the following changes in this patch: 
1. refined the handling for whitespace text
2. added support for xml:space attribute
3. changed the default indentation to 4
4. refined the handling for HTML block element and inline element

Would you like to have a look at this review?

Thanks,

Frank