Resolve visual defect when BorderlineWidth=0.0f

Resolve visual defect when BorderlineWidth=0.0f

Normally, Set borderlineWidth=0.0f directly doesn't make visual defect.
But when we animate the borderlineWidth,
we can se borderlineColor near 0.5pixel!

This visual defect occured cause we did hand-made anti-alias.
Now, we just multiply the borderline's with into the borderline's opacity.

This mechanisme is comes from what we draw borderline
when borderlineWidth is less then 1 pixel.

Change-Id: Ic8ef7b451d66ef0a625ad9c8392824d1f6cc6d9a
Signed-off-by: Eunki, Hong <eunkiki.hong@samsung.com>