Replace the connector used in `tt connect`

[LeonidVas]

Replace the connector used in module tt connect from https://github.com/FZambia/tarantool to https://github.com/tarantool/go-tarantool/

[oleg-jukovec]

Blocked by tarantool/go-tarantool#213 .