[FIX] sale_margin: uninstall_hook

When uninstalling the module sale_margin, the view 'sale_report' was deleted
because this view was overwritten  in this module.

But the module sale still uses the 'sale_report' view so it raised an error
each time this view was required.

opw:709328

addons/sale_margin/__init__.py

@@ -1,4 +1,21 @@
 # Part of Odoo. See LICENSE file for full copyright and licensing details.
 
+from functools import partial
+import openerp
+from openerp import api, SUPERUSER_ID
 import sale_margin
 import report
+
+
+
+def uninstall_hook(cr, registry):
+	def recreate_view(dbname):
+		db_registry = openerp.modules.registry.RegistryManager.new(dbname)
+		with api.Environment.manage(), db_registry.cursor() as cr:
+			env = api.Environment(cr, SUPERUSER_ID, {})
+			if 'sale.report' in env:
+				env['ir.module.module'].search([('name', '=', 'sale_margin')]).state
+				env['sale.report'].init()
+
+
+	cr.after("commit", partial(recreate_view, cr.dbname))

addons/sale_margin/__openerp__.py

@@ -18,4 +18,5 @@ Price and Cost Price.
     'data':['security/ir.model.access.csv','sale_margin_view.xml'],
     'auto_install': False,
     'installable': True,
+    'uninstall_hook': "uninstall_hook",
 }