* fix(emqx_machine): Fix start/stop callbacks
* chore(ekka): Bump version to 0.11.1
* fix(router): Wait for the tables
* fix(emqx_cluster_rpc): Stop cluster RPC when joining a cluster
* fix(emqx_app): Fix a deadlock when joining the cluster
* fix(emqx_telemetry): Wait for mnesia tables
* test(ct_helper): Start ekka before emqx