added pytest to requirements_dev

reworking test strucutre

reworked pytest.ini, removed functional imports, updated req_dev

remove unneeded __init__ files

add testing checker to local_settings examples

adding testing packages to system Python for docker

pytest.ini

@@ -0,0 +1,5 @@
+[pytest]
+DJANGO_SETTINGS_MODULE = awx.settings.development
+python_paths = awx/lib/site-packages
+python_files = *.py
+addopts = --create-db