[FIX] marketing_campaign: pass context as kwargs in overriden `search`

When converting a new API call to an old API call,
the context is expected to be found within the kwargs
argument. If not, it is seen as a regular argument.

See `get_context_split` in `openerp/api.py`

As it was not the case in the overidden method
`search` in `marketing_campaign.py`, if a module
overriden the method `search` of
`ir.actions.report.xml` using the new API, the
context wasn't treated as such correctly, and it leaded
to wrong number of arguments passed.

I take the opportunity to pass all arguments
that are passed as kwargs in the base `search`
as kwargs as well, to be clean.

opw-668471

addons/marketing_campaign/marketing_campaign.py

@@ -819,7 +819,7 @@ class report_xml(osv.osv):
         if object_id:
             model = self.pool.get('ir.model').browse(cr, uid, object_id, context=context).model
             args.append(('model', '=', model))
-        return super(report_xml, self).search(cr, uid, args, offset, limit, order, context, count)
+        return super(report_xml, self).search(cr, uid, args, offset=offset, limit=limit, order=order, context=context, count=count)