test(flakiness): prevent possible flakiness in test
If the spawned process doesn't have enough time to be properly set up,
the returned stacktrace may be empty, making the test fail. By
synchronizing the startup, we know that the process will have a proper
stacktrace by the time of the assertion.
* fix: ./bin/emqx ping return pong
* chore: waiting longer for logger flush log to disk
* fix: change swagger page's limit from 100 to 1000
* chore: type wrong
* fix: sync log to disk by logger_disk_log_h:filesync
If the spawned process doesn't have enough time to be properly set up,
the returned stacktrace may be empty, making the test fail. By
synchronizing the startup, we know that the process will have a proper
stacktrace by the time of the assertion.
Since `emqx_vm:get_process_info/1` only accepts PIDs as arguments,
it's impossible for `emqx_sys_mon:procinfo/1` to return after
receiving the atom `undefined`.
This adds the information from `proc_lib:initial_call/1` and the
current stacktrace from the process info to `emqx_sys_mon:procinfo/1`
to aid in debugging some warnings with no context such as the
following:
```
2021-11-23T12:33:59.387818+00:00 [warning] info: [{old_heap_block_size,45988046},{heap_block_size,22177879},{mbuf_size,0},{stack_size,40},{old_heap_size,22354134},{heap_size,7106339}], line: 130, mfa: emqx_sys_mon:handle_info/2, msg: large_heap, procinfo: [{pid,<0.2667.0>},{memory,579763664},{total_heap_size,68510672},{heap_size,22177879},{stack_size,40},{min_heap_size,233},{initial_call,{proc_lib,init_p,5}},{current_function,{gen,do_call,4}},{registered_name,[]},{status,running},{message_queue_len,360945},{group_leader,<0.1660.0>},{priority,normal},{trap_exit,false},{reductions,16493271},{last_calls,false},{catchlevel,4},{trace,0},{suspending,[]},{sequential_trace_token,[]},{error_handler,error_handler}]
```
* fix(flaky_test): improve live connection count test on CI
It seems that a race condition that is triggered more often in CI can
make the test fail, possibly due to the ETS write not being seen by
the subsequent read in the test.
* style(elvis): fix NL in emqx_connector.conf
* fix: generate place holder
* style: whitespace cleanup
* refactor(authz): placeholder for athuz
* test: authz test suite for placeholder
* fix: lw place holder suite
* fix: auth n redis suite
Co-authored-by: JimMoen <LnJimMoen@outlook.com>
JianBo He