<Swing Dev> [8] Review request for 8005391 Floating behavior of HTMLEditorKit parser

[Alexander Scherbatiy]

Hello,

Could you review the fix:
   bug: https://bugs.openjdk.java.net/browse/JDK-8005391
   webrev: http://cr.openjdk.java.net/~alexsch/8005391/webrev.00

The test in the webrev fails because SimpleAttributeSet returns 
attribute names as Hashtable keys which order is not preserved.
So the tags are also generated in the random order.

The suggested fix uses LinkedHashMap instead of Hashtable which 
guarantee predictable iteration order.

The LinkedHashMap implementation is not synchronized as it is done for 
the Hashtable.
However, the SimpleAttributeSet is designed to use on EDT like others 
swing classes.

Thanks,
Alexandr.