WIP: add el8 to circle builds
WIP: add el8 to circle builds

StackStorm/st2,nzlosh/st2,nzlosh/st2,Plexxi/st2,Plexxi/st2,nzlosh/st2,Plexxi/st2,StackStorm/st2,Plexxi/st2,nzlosh/st2,StackStorm/st2,StackStorm/st2