SWS-9: Creates framework for acceptance testing with BDD via behave

services/capability/requirements.txt

test/acceptance/features/download_notification.feature

test/acceptance/features/execute_capability.feature

test/acceptance/features/steps/__init__.py

test/acceptance/features/steps/run_capability.py

test/acceptance/features/steps/run_download_capability.py

test/acceptance/features/steps/send_download_notification.py

test/requirements.txt