SPEC: Remove duplicate sssd_ifp.
    
    The file sssd_ifp was installed by two subpackages: sssd-common and sssd-dbus
    I din't have instaled file org.freedesktop.sssd.infopipe.conf, because it is
    in package sssd-dbus. Missing conf file caused problem with starting
    the ifp service.
    
    [sssd] [monitor_service_init] (0x0400): Initializing D-BUS Service
    [sssd] [mt_svc_exit_handler] (0x0040): Child [ifp] exited with code [3]
    [sssd] [mt_svc_exit_handler] (0x0010): Process [ifp], definitely stopped!
    [sssd[ifp]] [sysbus_init] (0x0040): DBus error message: Connection ":1.522"
         is not allowed to own the service "org.freedesktop.sssd.infopipe" due to
         security policies in the configuration file
    [sssd[ifp]] [ifp_process_init] (0x0020):
         Failed to connect to the system message bus
    [sssd[ifp]] [sss_responder_ctx_destructor] (0x0400):
         Responder is being shut down
    
    Reviewed-by: Jakub Hrozek <jhrozek@redhat.com>
    (cherry picked from commit 3c2a6219550488e33fd9d50c74ac30b325f6b99a)