[AUI-1250] The rating display is not correct with floats

https://issues.liferay.com/browse/AUI-1250

Hey Nate,

FYI, this "Math.floor" was added by Zsaga in https://issues.liferay.com/browse/LPS-7760: alloy-ui@f31673d
I do not see any cons not to use "round".

Let us @istvan-tobias know if you have any concerns.

Regards,
Tibor