lib/oeqa/runtime: smart: serve repo on host ip only and increase timeout

Don't start the http server on 0.0.0.0, listen on host ip (end of tap interface) only.
Also use the timeout option (default is 300s for ssh commands) for all the commands
run in this module (mostly because smart update timeouts on mips).

Signed-off-by: Stefan Stanacar <stefanx.stanacar@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>