* feat(emqx_conf): move conf manager for emqx_machine to emqx_conf
* chore(emqx_conf): change emqx:get_config/2 to emqx_conf:get/2
* fix: common test failed
* fix: badmatch by typo wrong key
* fix(emqx_conf): get the wrong core nodes
* fix(emqx_conf): get core node's tnx_id not latest tnx_id
* fix: add ro_transation when copy conf file
* fix: delete debug info
* fix: change ekka_rlog to mria_rlog
* fix: remove cluster_rpc from emqx_machine.
* fix: don't call ekka:start/0 explicitly
* fix: ekka should be start in emqx_machine
Move the emqx_config:update,remove,reset APIs to emqx, to remove
the circular dependency between the modules emqx_config and
emqx_config_handler.
After this change the dependency among these modules will be:
```
emqx ---> emqx_config
| ^
| |
+ ---> emqx_conifg_handler
```
The serious influence:
authn:
api
authz:
api; api test suit
dashboard:
all closed
lwm2m:
api;
modules:
api(api_topic_metrics, modules_api); test suit(emqx_modules_SUITE)
prometheus:
api
retainer:
api; api test suit
rule_engine:
api: api test suit
telemetry:
api
And move emqx app back to root level
After realising the challenges of developing plugins in standalone
rebar projects. it is perhaps more smooth to keep using emqx as
a rebar dependency
Starting from 5.0.0, all apps in apps dir should follow semver
strictly. Do not use the umbrella project's release tags.
The universal tags made sense when we have applications scattered
in different repos. Now since this is an umbrella project, it is
enough to have a single package level version number corelated with
git tag.
