Add concurrent termination test
Add concurrent termination test

adamruzicka/dynflow,Dynflow/dynflow,daviddavis/dynflow,adamruzicka/dynflow,xprazak2/dynflow,iNecas/dynflow,adamruzicka/dynflow,daviddavis/dynflow,dLobatog/dynflow,adamruzicka/dynflow,jlsherrill/dynflow,ares/dynflow,ares/dynflow,Dynflow/dynflow,dLobatog/dynflow,daviddavis/dynflow,iNecas/dynflow,dLobatog/dynflow,ares/dynflow,daviddavis/dynflow,dLobatog/dynflow,Dynflow/dynflow,jlsherrill/dynflow,Dynflow/dynflow,xprazak2/dynflow