<Swing Dev> RFR JDK-8244557: test/jdk/javax/swing/JTabbedPane/TestBackgroundScrollPolicy.java failed

[Prasanta Sadhukhan]

Hi All,

Please review a test fix for an issue seen to be failing on mach5 
nightly testing.

This test was cloned from 
javax/swing/JTabbedPane/8007563/Test8007563.java (which was added to 
test fix for JTabbedPane background when tabs are opaque for default 
WRAP_TAB_LAYOUT policy)
and  pane.setTabLayoutPolicy(JTabbedPane.SCROLL_TAB_LAYOUT);

was added to test for SCROLL_TAB_LAYOUT not realising Test8007563.java 
is unstable and has been problemlisted.

The test is now rewritten to test only the problem statement which is to 
check for JTabbedPane background when tabs are opqaue for 
SCROLL_TAB_LAYOUT policy. The test still  fails without 8172269 fix.

Tested on all mach5 platforms for 100 iterations (job details in JBS)

Bug: https://bugs.openjdk.java.net/browse/JDK-8244557

webrev: http://cr.openjdk.java.net/~psadhukhan/8244557/webrev.0/

Regards
Prasanta