Avoid demo data using an exisiting account number

Fixes #26

account_bank_statement_import/demo/partner_bank.xml

@@ -4,7 +4,7 @@
 
         <record id="ofx_partner_bank_1" model="res.partner.bank">
             <field name="owner_name">Agrolait</field>
-            <field name="acc_number">00987654321</field>
+            <field name="acc_number">00987654319</field>
             <field name="partner_id" ref="base.res_partner_2"></field>
             <field name="state">bank</field>
             <field name="bank" ref="base.res_bank_1"/>