fix test to use vmq_reg_leader directly
fix test to use vmq_reg_leader directly

sunnyjain1/vmq_server,larshesel/vmq_server,larshesel/vmq_server,erlio/vernemq,dergraf/vmq_server,dergraf/vmq_server,erlio/vmq_server,erlio/vernemq,erlio/vmq_server,erlio/vernemq,erlio/vernemq