NCE controller mock added

src/tests/tools/mock_nce_ctrl/Dockerfile

src/tests/tools/mock_nce_ctrl/MockNCECtrl.py

src/tests/tools/mock_nce_ctrl/README.md

src/tests/tools/mock_nce_ctrl/ResourceAppFlows.py

src/tests/tools/mock_nce_ctrl/ResourceApps.py

src/tests/tools/mock_nce_ctrl/__init__.py

src/tests/tools/mock_nce_ctrl/build.sh

src/tests/tools/mock_nce_ctrl/deploy.sh

src/tests/tools/mock_nce_ctrl/mock-nce-ctrl.yaml

src/tests/tools/mock_nce_ctrl/requirements.in

src/tests/tools/mock_nce_ctrl/run.sh