* add default logging NullHandler
* fix indentation mismatch
* rename control to calls to better point out its purpose
* rename class to EjabberdApiCalls to better point out it purpose
* changed get_nodes to an internal support method
* split up api and metrics class
* revamped file nameming to better resemble their function
* update prometheus and influx files
* fixed version regex to not break on - in version string