outposts: add consistent name and type to metrics

Signed-off-by: Jens Langhammer <jens.langhammer@beryju.org>

internal/outpost/ldap/ldap.go

@@ -86,3 +86,7 @@ func NewServer(ac *ak.APIController) *LDAPServer {
 	s.CloseFunc("", ls)
 	return ls
 }
+
+func (ls *LDAPServer) Type() string {
+	return "ldap"
+}