Impacted versions: 8-11

## Current behavior:

If during an XMLRPC call you try to get anything from `http.request`, you'd get a `RuntimeError` such as this one:

```
Traceback (most recent call last):
  File "/opt/odoo/custom/src/odoo/odoo/service/wsgi_server.py", line 56, in xmlrpc_return
    result = odoo.http.dispatch_rpc(service, method, params)
  File "/opt/odoo/custom/src/odoo/odoo/http.py", line 118, in dispatch_rpc
    result = dispatch(method, params)
  File "/opt/odoo/custom/src/odoo/odoo/service/common.py", line 57, in dispatch
    return g[exp_method_name](*params)
  [...]
  File "/usr/local/lib/python2.7/dist-packages/werkzeug/local.py", line 343, in __getattr__
    return getattr(self._get_current_object(), name)
  File "/usr/local/lib/python2.7/dist-packages/werkzeug/local.py", line 302, in _get_current_object
    return self.__local()
  File "/usr/local/lib/python2.7/dist-packages/werkzeug/local.py", line 135, in _lookup
    raise RuntimeError(\'object unbound\')
RuntimeError: object unbound
```

This renders imposible in practice to fix issues such as https://github.com/OCA/server-tools/issues/1125 or to implement https://github.com/odoo/odoo/pull/22212#issuecomment-380425764.

## Expected behavior:

XML-RPC calls should have request, since after all they belong to one. Otherwise, at least there should be an alternate way to access the request parameters.

Fix for v12: https://github.com/odoo/odoo/pull/24187

@Tecnativa
odoo/http.py
template = kw.pop('template', None)
        qcontext = kw.pop('qcontext', None)
        uid = kw.pop('uid', None)
        super(Response, self).__init__(*args, **kw)
        self.set_default(template, qcontext, uid)
    def set_default(self, template=None, qcontext=None, uid=None):
        self.template = template
        self.qcontext = qcontext or dict()
        self.qcontext['response_template'] = self.template
        self.uid = uid
        
        if request.endpoint and 'cors' in request.endpoint.routing:
            self.headers.set('Access-Control-Allow-Origin', request.endpoint.routing['cors'])
            methods = 'GET, POST'
            if request.endpoint.routing['type'] == 'json':
                methods = 'POST'
            elif request.endpoint.routing.get('methods'):
                methods = ', '.join(request.endpoint.routing['methods'])
            self.headers.set('Access-Control-Allow-Methods', methods)
    @property
    def is_qweb(self):
        return self.template is not None
    def render(self):
        """ Renders the Response's template, returns the result
        """
        env = request.env(user=self.uid or request.uid or odoo.SUPERUSER_ID)
        self.qcontext['request'] = request
        return env["ir.ui.view"].render_template(self.template, self.qcontext)
    def flatten(self):