[ADD]Added stock_negative module to prohibit negative stock.

[IMP]Improved typo replaced OpenERP with Odoo.

[IMP]Removed sequence from openerp.py file.

[FIX]Fix yml test cases changed product_id..

[REM]Removed yml test case for negative stock.

[IMP]Improved yml test case.

[IMP]Improved yml test case.

[IMP]Improved yml test case.

[IMP]Improved yml test case.

[IMP]Improved yml test case.

[IMP]Improved yml test case.

[IMP]Improved yml test case.