Pass -y argument to apt-get cleanup commands

install/collabora-install.sh

@@ -41,8 +41,8 @@ motd_ssh
 customize
 
 msg_info "Cleaning up"
-$STD apt-get autoremove
-$STD apt-get autoclean
+$STD apt-get -y autoremove
+$STD apt-get -y autoclean
 msg_ok "Cleaned"
 
 echo -e "Don't forget to setup reverse proxy. See ${BL}https://sdk.collaboraonline.com/docs/installation/Proxy_settings.html#reverse-proxy-settings-in-nginx-config-ssl-termination${CL}"