Drop validation of service name which is not implemented for
the other daemons, to simplify handling of the provided service name.
This allows us to more easily offload the service name definition to
hiera data in the near future.
Change-Id: Icb6c0c8db190c383fd55e32dd7c71d1f7c7c46a7
Signed-off-by: Takashi Kajinami <kajinamit@oss.nttdata.com>