ENYO-1725: enyo.Video: setPlaybackRate should be called ahead of play in a certain case
ENYO-1725: enyo.Video: setPlaybackRate should be called ahead of play in a certain case

## Issue
If user selects REW/FF when content is paused, setPlaybackRate should be called ahead of play.

## Fix
added flag, "isNeedPlay", to make node play after setPlaybackRate  .

Enyo-DCO-1.1-Signed-off-by: Suhyung Lee (suhyung2.lee@lge.com)

PKRoma/enyo,enyojs/enyo,PKRoma/enyo,enyojs/enyo