[FIX] account: set reconciliation date as admin

The user performing reconciliations may not always
have the right to update the corresponding partners,
for example if a partner is also a system user.

Doing it as super-user after verifying that the
user is indeed allowed to reconcile journal items
works around the problem.

Fixes #11931

addons/account/partner.py

@@ -22,6 +22,7 @@
 from operator import itemgetter
 import time
 
+from openerp import SUPERUSER_ID
 from openerp.osv import fields, osv
 
 class account_fiscal_position(osv.osv):
@@ -186,7 +187,8 @@ class res_partner(osv.osv):
         return False
 
     def mark_as_reconciled(self, cr, uid, ids, context=None):
-        return self.write(cr, uid, ids, {'last_reconciliation_date': time.strftime('%Y-%m-%d %H:%M:%S')}, context=context)
+        self.pool['account.move.reconcile'].check_access_rights(cr, uid, 'write')
+        return self.write(cr, SUPERUSER_ID, ids, {'last_reconciliation_date': time.strftime('%Y-%m-%d %H:%M:%S')}, context=context)
 
     _columns = {
         'credit': fields.function(_credit_debit_get,