Dockerize remainder of PyClient tests

This PR moves the test of the Python client tests to be run from a docker container. I also removed the legacy suite `simple_connection_tests.py` and moved any relevant tests to the smoke test suite

Author: NiallEgan

cmdexec/clients/python/tests/docker-entrypoint.sh

@@ -8,11 +8,6 @@ unit() {
 }
 
 integration() {
-  # This is just a temporary hack until we have done the full migration and can change the import
-  # names across the board
-  touch qa/__init__.py
-  touch qa/test/__init__.py
-  touch qa/test/bi/__init__.py
   python test_executor.py "$@"
 }