router/routertest: allow custom healthcheck on test router
router/routertest: allow custom healthcheck on test router

cezarsa/tsuru,ggarnier/tsuru,gwmoura/tsuru,cezarsa/tsuru,ggarnier/tsuru,tsuru/tsuru,cezarsa/tsuru,ArxdSilva/tsuru,guilhermebr/tsuru,ArxdSilva/tsuru,ArxdSilva/tsuru,ArxdSilva/tsuru,tsuru/tsuru,ggarnier/tsuru,guilhermebr/tsuru,cezarsa/tsuru,ggarnier/tsuru,tsuru/tsuru,guilhermebr/tsuru,guilhermebr/tsuru,gwmoura/tsuru,tsuru/tsuru,gwmoura/tsuru