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
pass
class SessionExpiredException(Exception):
    pass
class OpenERPSession(werkzeug.contrib.sessions.Session):
    def __init__(self, *args, **kwargs):
        self.inited = False
        self.modified = False
        self.rotate = False
        super(OpenERPSession, self).__init__(*args, **kwargs)
        self.inited = True
        self._default_values()
        self.modified = False
    def __getattr__(self, attr):
        return self.get(attr, None)
    def __setattr__(self, k, v):
        if getattr(self, "inited", False):
            try:
                object.__getattribute__(self, k)
            except:
                return self.__setitem__(k, v)
        object.__setattr__(self, k, v)
    def authenticate(self, db, login=None, password=None, uid=None):