fixed: travis redis cache storage ownership
fixed: travis redis cache storage ownership

onaio/enketo-express,pfitzpaddy/ngm-enketo-express,OpenClinica/enketo-express-oc,OpenClinica/enketo-express-oc,onaio/enketo-express,pfitzpaddy/ngm-enketo-express,sdibona/enketo-express-oc,onaio/enketo-express,enketo/enketo-express,OpenClinica/enketo-express-oc,kobotoolbox/enketo-express,pfitzpaddy/ngm-enketo-express,hossein/enketo-express,hossein/enketo-express,enketo/enketo-express,kobotoolbox/enketo-express,kobotoolbox/enketo-express,hossein/enketo-express,hossein/enketo-express,sdibona/enketo-express-oc,kevinmwangi/enketo-express,enketo/enketo-express,sdibona/enketo-express-oc,kobotoolbox/enketo-express,kevinmwangi/enketo-express,sdibona/enketo-express-oc,kevinmwangi/enketo-express