Start listings consistently with the current PG state, add wait_up_timeout

This still doesn't make listings 100% consistent yet; for 100% consistent
listings we have to receive listings only from the primary OSD, not from all
peer OSDs, but this issue will be fixed separately.

src/cmd/cli.h

@@ -30,7 +30,7 @@ struct cli_result_t
 class cli_tool_t
 {
 public:
-    uint64_t iodepth = 4, parallel_osds = 32;
+    uint64_t iodepth = 32, parallel_osds = 4;
     bool progress = false;
     bool list_first = false;
     bool json_output = false;