Rabbitmq support

[sstoychev]

Added RabbitMQ output with the relevant configuration.
pika added as an option as this is the package described in RabbitMQ's tutorial

[dmachard]

Thank for this PR. Could you check why all test results are failed ? something about the "pika" module.

Traceback (most recent call last):\n File "<string>", line 1, in <module>\n File "/home/runner/work/dnstap-receiver/dnstap-receiver/dnstap_receiver/__init__.py", line 1, in <module>\n from dnstap_receiver.receiver import start_receiver\n File "/home/runner/work/dnstap-receiver/dnstap-receiver/dnstap_receiver/receiver.py", line 32, in <module>\n from dnstap_receiver.outputs import output_rabbitmq\n File "/home/runner/work/dnstap-receiver/dnstap-receiver/dnstap_receiver/outputs/output_rabbitmq.py", line 6, in <module>\n from pika.adapters.blocking_connection import BlockingChannel\nModuleNotFoundError: No module named \'pika\'\n'

[sstoychev]

My bad.
I fixed the issue and verified it by building a wheel and importing in Python docker in order to be sure the environment is missing pika :)

build_wheel.sh:

#!/bin/bash
TAG=`git describe --tags --abbrev=0`
COMMIT=`git log -n1 --format=format:"%h"`
SETUP_PY=`sed "s/{{ version }}/$TAG-$COMMIT+PV/g" setup.j2`

python3 -c "$SETUP_PY" bdist_wheel

docker_test.sh

#!/bin/bash
TAG=`git describe --tags --abbrev=0`
COMMIT=`git log -n1 --format=format:"%h"`

docker run \
    -ti \
    -v "$PWD"/dist:/dist \
    python \
    python3 -m pip install /dist/dnstap_receiver-${TAG}_${COMMIT}_PV-py3-none-any.whl && python3 -c 'import dnstap_receiver' && echo "SUCCESS"