The jq function in the rule engine uses the jq NIF implementation by
default so there is often no need to start any jq port programs. Before
this commit jq port programs were started anyway. This is fixed by not
starting the jq application (the jq application is started automatically
when the jq port implementation is activated).
Before this commit source had been compiling with inconsistent
`erl_opts` under test profile with `PROFILE` env set to `emqx`.
```
{compile_info,[{emqx_vsn,"5.0.0-beta.5-g948d4170"}]},
{d,'EMQX_RELEASE_EDITION',ce},
```
Instead stop passing `emqx_vsn` through compile options as is
expected by `emqx_release:version/0`.
Testcase `t_log_file` was flapping when run happened to pass through
boundary of a second. Archive files' `ctime`s could differ between
consecutive archive downloads.
Even though relx 4.7.0 seems to support passing overlay vars through
`overlay_vars` option, it was designed to hold list of filenames where
vars are defined and works unreliable if used as a proplist.
lafirest