Install elastic search 2.4.0 when running on travis
Install elastic search 2.4.0 when running on travis

pozorvlak/growstuff,Br3nda/growstuff,Growstuff/growstuff,yez/growstuff,cesy/growstuff,Br3nda/growstuff,Growstuff/growstuff,dv2/growstuff,pozorvlak/growstuff,dv2/growstuff,pozorvlak/growstuff,cesy/growstuff,yez/growstuff,pozorvlak/growstuff,yez/growstuff,dv2/growstuff,Br3nda/growstuff,cesy/growstuff,dv2/growstuff,Br3nda/growstuff,yez/growstuff,Growstuff/growstuff,Growstuff/growstuff,cesy/growstuff