It is common for OpenStack projects to use oslo-config-generator to generate
a sample config file which contains all available configuration options.
Work items:
* removed etc/monasca/log-api.conf (it is autogenerated)
* keep all config in one place to mimic the configuration file
* added configuration files to documentation
Story: 2000970
Task: 4121
Change-Id: I8777ed6cd38739e87b19be248b9c120e84626ad1
d243ed35d0