[FIX] mail,delivery: fix incorrect imports

addons/delivery/models/delivery_carrier.py

@@ -4,6 +4,7 @@
 import logging
 from openerp import api, fields, models, _
 from openerp.exceptions import UserError, ValidationError
+from openerp.tools.safe_eval import safe_eval as eval
 
 _logger = logging.getLogger(__name__)
 

addons/mail/models/mail_channel.py

@@ -9,6 +9,7 @@ from openerp import _, api, fields, models, modules, tools
 from openerp.tools.misc import DEFAULT_SERVER_DATETIME_FORMAT
 from openerp.exceptions import UserError
 from openerp.osv import expression
+from openerp.tools.safe_eval import safe_eval as eval
 
 from openerp.addons.bus.models.bus_presence import AWAY_TIMER