gendispatch: add DomainRestoreParams as requiring conn argument
gendispatch: add DomainRestoreParams as requiring conn argument

in preparation for the addition of DomainRestoreParams,
add it to the list of methods requiring a conn first argument.

Signed-off-by: Claudio Fontana <b69352cd5992c270120dd2b68be30033a38f7beb@suse.de>
Reviewed-by: Daniel P. Berrangé <bb938cf255e055ff3507f2627d214e8e62118fcf@redhat.com>

jfehlig/libvirt,zippy2/libvirt,jfehlig/libvirt,olafhering/libvirt,libvirt/libvirt,zippy2/libvirt,jfehlig/libvirt,olafhering/libvirt,crobinso/libvirt,libvirt/libvirt,libvirt/libvirt,jfehlig/libvirt,zippy2/libvirt,crobinso/libvirt,crobinso/libvirt,crobinso/libvirt,zippy2/libvirt,olafhering/libvirt,libvirt/libvirt,olafhering/libvirt