Try to fix rpc host on travis
Try to fix rpc host on travis

Apparently the rpc client can't connect to '127.0.0.1' on travis.
This is a brute-force approach at fixing this.

tomashaber/raiden,charles-cooper/raiden,charles-cooper/raiden,hackaugusto/raiden,tomashaber/raiden,tomashaber/raiden,hackaugusto/raiden,tomaaron/raiden,tomashaber/raiden,tomaaron/raiden,tomaaron/raiden,tomaaron/raiden,tomashaber/raiden