Update .travis.yml

Author: hazzik

.travis.yml

@@ -43,7 +43,7 @@ before_install:
       sudo service  --status-all
       service  --status-all
       #sudo service firebird restart
-      systemctl restart firebird-superserver.service
+      sudo systemctl restart firebird-superserver.service
       set +x
       set +e
     fi