fix incorrect variable name in stratos docker image
fix incorrect variable name in stratos docker image

pubudu538/stratos,apache/stratos,anuruddhal/stratos,lasinducharith/stratos,apache/stratos,Thanu/stratos,hsbhathiya/stratos,gayangunarathne/stratos,asankasanjaya/stratos,gayangunarathne/stratos,agentmilindu/stratos,ravihansa3000/stratos,dinithis/stratos,asankasanjaya/stratos,ravihansa3000/stratos,asankasanjaya/stratos,lasinducharith/stratos,ravihansa3000/stratos,lasinducharith/stratos,ravihansa3000/stratos,pkdevbox/stratos,lasinducharith/stratos,Thanu/stratos,anuruddhal/stratos,agentmilindu/stratos,dinithis/stratos,hsbhathiya/stratos,agentmilindu/stratos,pkdevbox/stratos,asankasanjaya/stratos,pkdevbox/stratos,dinithis/stratos,gayangunarathne/stratos,anuruddhal/stratos,Thanu/stratos,hsbhathiya/stratos,dinithis/stratos,pubudu538/stratos,lasinducharith/stratos,anuruddhal/stratos,gayangunarathne/stratos,pkdevbox/stratos,asankasanjaya/stratos,gayangunarathne/stratos,apache/stratos,pubudu538/stratos,ravihansa3000/stratos,Thanu/stratos,asankasanjaya/stratos,agentmilindu/stratos,pkdevbox/stratos,hsbhathiya/stratos,pkdevbox/stratos,gayangunarathne/stratos,Thanu/stratos,gayangunarathne/stratos,apache/stratos,asankasanjaya/stratos,anuruddhal/stratos,Thanu/stratos,ravihansa3000/stratos,Thanu/stratos,anuruddhal/stratos,pubudu538/stratos,lasinducharith/stratos,dinithis/stratos,pubudu538/stratos,apache/stratos,apache/stratos,agentmilindu/stratos,hsbhathiya/stratos,ravihansa3000/stratos,dinithis/stratos,hsbhathiya/stratos,pkdevbox/stratos,apache/stratos,lasinducharith/stratos,agentmilindu/stratos,anuruddhal/stratos,dinithis/stratos,pubudu538/stratos,pubudu538/stratos,agentmilindu/stratos,hsbhathiya/stratos