Fix meaning of msg_stripe_receivable

The meaning of the message was mistakenly changed by changeset a8550d684cac.

issue8121
review279131002

message.xml

@@ -7,7 +7,7 @@ this repository contains the full copyright notices and license terms. -->
             <field name="text">To process payment "%(payment)s" you must set a Stripe token or customer.</field>
         </record>
         <record model="ir.message" id="msg_stripe_receivable">
-            <field name="text">You cannot use stripe journal "%(journal)s" on receivable payment "%(payment)s".</field>
+            <field name="text">To pay "%(payment)s", you cannot use a stripe journal "%(journal)s".</field>
         </record>
     </data>
 </tryton>