FIX = operator AS $eq

[tinogis]

Changes equal operator (=) translation to the $eq operator. It allows mix equal and other operator in the same search:

This fails without this change

model_obj.search(cursor, uid, [('a','=',3),('a','in', [3,4,5])]) 

Fault: <Fault 'int' object has no attribute 'update': 'Traceback (most recent call last):\n  File "/home/erp/src/erp/server/bin/netsvc.py", line 361, in dispatch\n    result = LocalService(service_name)(method, *params)\n  File "/home/erp/src/erp/server/bin/netsvc.py", line 100, in __call__\n    res = getattr(self, method)(*params)\n  File "/home/erp/src/erp/server/bin/service/web_services.py", line 584, in execute\n    res = service.execute(db, uid, object, method, *args)\n  File "/home/erp/src/erp/server/bin/osv/osv.py", line 61, in wrapper\n    return f(self, dbname, *args, **kwargs)\n  File "/home/erp/src/erp/server/bin/osv/osv.py", line 132, in execute\n    res = pool.execute_cr(cr, uid, obj, method, *args, **kw)\n  File "/home/erp/src/erp/server/bin/osv/osv.py", line 123, in execute_cr\n    return getattr(object, method)(cr, uid, *args, **kw)\n  File "/home/erp/src/erp/server/bin/addons/mongodb_backend/orm_mongodb.py", line 462, in search\n    new_args = mdbpool.translate_domain(tmp_args)\n  File "/home/erp/src/erp/server/bin/addons/mongodb_backend/mongodb2.py", line 106, in translate_domain\n    new_domain[field].update(clause[field])\nAttributeError: \'int\' object has no attribute \'update\'\n'>