Added status messages for queries in progress.

Moved the query caching code underneath the result publish code, as the
caching was increasing the time before the result was returned.

If a broker is not directly available, the service will poll every 10
seconds and wait until the broker is available. Alice was updated to
v0.1.15 as well.

Most of this code was taken straight from the schema service. No tests
were written because this is entirely dependent on external
dependencies.

Does not work with RMQ and only single node requests are working for now

Together with Arjan.

Not finally implemented, still unclean, but functional!

implementatie query request naar database en ontvangen en verwerken resultaat naar JSON