oeqa/utils/httpserver: allow to pass in listening port
Being able to specify the listening port is useful when
running OEQA from within a docker container, e.g.
crops or any other solution.
In that case, a port on the outside must be mapped to a
specific port inside the container. If no port is specified
for the http server module in this case, the http server
would choose a random port, which is unlikely to be mapped
and thus won't be reachable from the outside.
Signed-off-by: André Draszik <git@andred.net> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
