Speed up the CI tests
This implements two changes in the CI tests to speed them up:
- use a Docker image including
clang
,clang-tidy
,netcat
,python3
, and the Python dependencies (Dockerfile + script to build it is provided in this MR as well) - merge the
unit_test
andfunctional_test
stage to make those tests run in parallel
Fixes: #16 (closed)
Edited by Felix Walter