Generate the neutron core sample config files by using the oslo
generator. The files are generated with a .sample extension and
replace the static example configuration files.
Once the generation code is delivered, the static config files
will be removed.
Change-Id: Ic37a16b6cf8eb92030649f1fc8b198738a8cc104
Related-blueprint: autogen-neutron-conf-file
Partial-bug: #1199963
Depends-On: I1c6dc4e7d479f1b7c755597caded24a0f018c712
Co-Authored-By: Louis Taylor <louis@kragniz.eu>