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: I14417328d26b48eb4484d1a1b368f6417fb8211a
Signed-off-by: Takashi Kajinami <kajinamit@oss.nttdata.com>