Davrods: networking update to work with new iptables

[scimerman]

Currently we have
:443 incoming packets at host > iptables (co-managed by docker) > docker software bridge > :443 instance

I eliminated the use of software bridge:

... which allows containers connected to the same bridge network to communicate, while providing isolation from containers which are not connected to that bridge network.

Since we do not intend to make more docker instances on irods production machines, where we would connect some, but isolate other instance, this option is removed.

I changed davrods to be working on host network instead:

... container’s network stack is not isolated from the Docker host (the container shares the host’s networking namespace), and the container does not get its own IP-address allocated.

This will change to:
incoming packets > iptables > exposed port at the docker instance

Tested on production machine: works

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Also removed the entire filebeat dependency, as we do not use it and was even hard coded to internal Maastrichts url of control their online status machine.