* refactor(authz): macro move to hrl and rename, add meta example
* refactor(authz_api_mnesia): use config schemas for request validations
* chore(authz_api_mnesia): suite module typerefl fit
* chore(style): authz_api_mnesia style format
* 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
* feat(authorization): add authorization api
* feat(authorization): add check function
* feat(authorization): use hocon config file
* feat(authz): add mysql connector
* feat(authz): support pgsql
* feat(connector): support redis
* chore(authz): use "publish/subscribe/all" instead of "pub/sub/pubsub"