Change akanda devstack configuration file directory

DHC-1841

Make akanda devstack install config files into the same
/etc dir as our production configuration.

Change-Id: I9507e4ec239d7ebf8257adcbe91b4f21623c362f
Signed-off-by: Rosario Di Somma <rosario.disomma@dreamhost.com>
Merge pull request #22 from rodis/feature/change-akanda-conf-dir

Change akanda devstack configuration file directory