added checks to test that data contains at least one outlier in any category. (#4971)
added checks to test that data contains at least one outlier in any category. (#4971)


ptitjano/bokeh,azjps/bokeh,ericmjl/bokeh,jakirkham/bokeh,draperjames/bokeh,philippjfr/bokeh,dennisobrien/bokeh,ptitjano/bokeh,philippjfr/bokeh,draperjames/bokeh,draperjames/bokeh,ericmjl/bokeh,percyfal/bokeh,Karel-van-de-Plassche/bokeh,mindriot101/bokeh,percyfal/bokeh,stonebig/bokeh,mindriot101/bokeh,jakirkham/bokeh,ptitjano/bokeh,dennisobrien/bokeh,rs2/bokeh,DuCorey/bokeh,aavanian/bokeh,timsnyder/bokeh,aavanian/bokeh,DuCorey/bokeh,aavanian/bokeh,stonebig/bokeh,azjps/bokeh,percyfal/bokeh,rs2/bokeh,ericmjl/bokeh,dennisobrien/bokeh,DuCorey/bokeh,stonebig/bokeh,timsnyder/bokeh,schoolie/bokeh,stonebig/bokeh,percyfal/bokeh,draperjames/bokeh,aavanian/bokeh,bokeh/bokeh,timsnyder/bokeh,timsnyder/bokeh,DuCorey/bokeh,aiguofer/bokeh,Karel-van-de-Plassche/bokeh,schoolie/bokeh,schoolie/bokeh,jakirkham/bokeh,dennisobrien/bokeh,ericmjl/bokeh,bokeh/bokeh,azjps/bokeh,bokeh/bokeh,rs2/bokeh,ericmjl/bokeh,DuCorey/bokeh,aiguofer/bokeh,rs2/bokeh,bokeh/bokeh,jakirkham/bokeh,aavanian/bokeh,mindriot101/bokeh,philippjfr/bokeh,rs2/bokeh,azjps/bokeh,bokeh/bokeh,aiguofer/bokeh,Karel-van-de-Plassche/bokeh,percyfal/bokeh,philippjfr/bokeh,dennisobrien/bokeh,mindriot101/bokeh,Karel-van-de-Plassche/bokeh,azjps/bokeh,aiguofer/bokeh,schoolie/bokeh,Karel-van-de-Plassche/bokeh,jakirkham/bokeh,draperjames/bokeh,ptitjano/bokeh,ptitjano/bokeh,aiguofer/bokeh,schoolie/bokeh,timsnyder/bokeh,philippjfr/bokeh