title: TypeError: write() got multiple values for keyword argument 'context'
body: <p>I'm using new API, I want to change the state after clicking the button of my wizard but it returns an error every time I click the button:</p>
  
  <pre><code>TypeError: write() got multiple values for keyword argument 'context'
  </code></pre>
  
  <p>Traceback:</p>
  
  <pre><code>Traceback (most recent call last):
    File "/home/workspace/odoo8/openerp/http.py", line 537, in _handle_exception
      return super(JsonRequest, self)._handle_exception(exception)
    File "/home/workspace/odoo8/openerp/http.py", line 574, in dispatch
      result = self._call_function(**self.params)
    File "/home/workspace/odoo8/openerp/http.py", line 310, in _call_function
      return checked_call(self.db, *args, **kwargs)
    File "/home/workspace/odoo8/openerp/service/model.py", line 118, in wrapper
      return f(dbname, *args, **kwargs)
    File "/home/workspace/odoo8/openerp/http.py", line 307, in checked_call
      return self.endpoint(*a, **kw)
    File "/home/workspace/odoo8/openerp/http.py", line 803, in __call__
      return self.method(*args, **kw)
    File "/home/workspace/odoo8/openerp/http.py", line 403, in response_wrap
      response = f(*args, **kw)
    File "/home/workspace/odoo8/addons/web/controllers/main.py", line 948, in call_button
      action = self._call_kw(model, method, args, {})
    File "/home/workspace/odoo8/addons/web/controllers/main.py", line 936, in _call_kw
      return getattr(request.registry.get(model), method)(request.cr, request.uid, *args, **kwargs)
    File "/home/workspace/odoo8/openerp/api.py", line 268, in wrapper
      return old_api(self, *args, **kwargs)
    File "/home/workspace/odoo8/openerp/api.py", line 399, in old_api
      result = method(recs, *args, **kwargs)
    File "/home/workspace/odoo8/custom_addons/my_module/models/test_module.py", line 14, in action_credit
      sale_order.write(sale_id,{'state': 'order_confirm'})
    File "/home/workspace/odoo8/openerp/api.py", line 266, in wrapper
      return new_api(self, *args, **kwargs)
    File "/home/workspace/odoo8/openerp/api.py", line 592, in new_api
      result = method(self._model, cr, uid, self.ids, *args, **old_kwargs)
  TypeError: write() got multiple values for keyword argument 'context'
  </code></pre>
  
  <p>.py file:</p>
  
  <pre><code>from openerp.osv import orm
  from openerp import models, api, _ 
  
  class TestOverride(models.TransientModel):
      _name = 'test.override'
  
      @api.multi
      def action_override(self):
          sale_order = self.env['sale.order']
          sale_id = self._context['sale_id']
          sale_order.write(sale_id,{'state': 'order_confirm'})
          return True
  
  class sale_order(models.Model):
      _inherit = "sale.order"
  
      @api.multi
      def action_button_confirm(self):
          for order_id in self:
              #
                  if condition:
                      return {
                          'name': 'Test',
                          'view_mode': 'form',
                          'view_type': 'form',
                          'res_model': 'test.override',
                          'type': 'ir.actions.act_window',
                          'nodestroy': True,
                          'target': 'new',
                          'context': {'sale_id': order_id.id}
                              }
  
          self.write(order_id, {'state': 'order_confirm'})
          return True
  </code></pre>