Test for multi series scatter chart
Test for multi series scatter chart

This added test make sure circles rendered on
multi series scatter chart have different color
with circles from other series

Also:
 1. Separates tests in scatterchart-test

MargiePea/react-d3,BigDataSamuli/react-d3,captainamerican/react-d3,nightlyop/react-d3,Jonekee/react-d3,ovjhc/react-d3,nicolasyanncouturier/react-d3,tobyredd/rd3,nightlyop/react-d3,esbullington/react-d3,Clemency10/react-d3,Clemency10/react-d3,mwhite/react-d3,Keepsite/react-d3,TannerRogalsky/react-d3,yang-wei/rd3,Keepsite/react-d3,nnnnathann/react-d3,orls/react-d3,BigDataSamuli/react-d3,banzai-inc/react-d3,yashprit/react-d3,ernest-rhinozeros/react-d3,ovjhc/react-d3,kdoh/react-d3,vladikoff/react-d3,reactiva/react-d3,MargiePea/react-d3,orls/react-d3,captainamerican/react-d3,tobyredd/rd3,nicolasyanncouturier/react-d3,banzai-inc/react-d3,yashprit/react-d3,reactiva/react-d3,ernest-rhinozeros/react-d3,mwhite/react-d3,TannerRogalsky/react-d3,nnnnathann/react-d3,kdoh/react-d3,Jonekee/react-d3,esbullington/react-d3,vladikoff/react-d3