Wait for member replication after JOIN and include desktop diagnostics

tests/test_dm_invite.c

@@ -175,6 +175,9 @@ int main(void) {
           "delivered link is registered with ten minute lifetime");
     CHECK(!join_link(ua, link), "B joins target group using received PM link");
     char target_id[64]; snprintf(target_id, sizeof(target_id), "%llu", (unsigned long long)target);
+    deadline = get_time_tb() + 100000;
+    while (!topo_node_sqlite_member_in_channel(nodes[1]->topo_sqlite_db, target_id, nodes[1]->node_id) &&
+           get_time_tb() < deadline) uasync_poll(ua, 100);
     CHECK(topo_node_sqlite_member_in_channel(nodes[0]->topo_sqlite_db, target_id, nodes[1]->node_id) &&
           topo_node_sqlite_member_in_channel(nodes[1]->topo_sqlite_db, target_id, nodes[1]->node_id), "membership committed on both nodes");
     request(6, target, "", 0);