fix(scylla_bench_thread): add all available node to command
fix(scylla_bench_thread): add all available node to command

Since in some cases when the stress command start, one of the
nodes might be down, and we need to make sure the stress command
can connect to any of the available nodes and start the stress.

scylladb/scylla-cluster-tests,scylladb/scylla-cluster-tests,scylladb/scylla-cluster-tests,scylladb/scylla-cluster-tests,scylladb/scylla-cluster-tests