[12] RFR JDK-8213049:Invalid HTML5 in javax.swing files

[Prasanta Sadhukhan]

Hi All,

Please review a doc-fix to comply with HTML5 standard,mainly removing 
the obsolete "summary" attributes.

Bug: https://bugs.openjdk.java.net/browse/JDK-8213049
webrev: http://cr.openjdk.java.net/~psadhukhan/8213049/webrev.0/

Regards
Prasanta