[IMP] stock: Convert yml file to python and xml

addons/stock/__manifest__.py

addons/stock/data/stock_data.xml

addons/stock/data/stock_data.yml

addons/stock/data/stock_demo.yml

addons/stock/data/stock_demo2.xml

addons/stock/data/stock_demo_pre.xml

addons/stock/data/stock_demo_pre.yml

addons/stock/data/stock_location_demo_cpu3.xml

addons/stock/data/stock_location_demo_cpu3.yml

addons/stock/data/stock_orderpoint_demo.xml

addons/stock/data/stock_orderpoint_demo.yml

addons/stock/test/packing.yml

addons/stock/test/packingneg.yml

addons/stock/test/procrule.yml

addons/stock/test/stock_users.yml

addons/stock/test/wiseoperator.yml

addons/stock/tests/__init__.py

addons/stock/tests/test_packing.py

addons/stock/tests/test_packing_neg.py

addons/stock/tests/test_proc_rule.py