[IMP] payment_sips: convert config param to proper field

The config param 'sips.key_version' was introduced "some time ago"
in revision a62480ad0f to allow setting the `keyVersion` POST param
to an arbitrary value, allowing other SIPS-comptatible providers to be
used with this module.

This revision (finally) converts this fix to a proper field.

Task-2259942

addons/payment_sips/__manifest__.py

@@ -5,15 +5,16 @@
 
 {
     'name': 'Worldline SIPS',
-    'version': '1.0',
+    'version': '1.1',
     'author': 'Eezee-It',
     'category': 'Accounting/Payment Acquirers',
     'sequence': 385,
     'description': """
 Worldline SIPS Payment Acquirer for online payments
 
-Works with Worldline keys version 2.0, contains implementation of
-payments acquirer using Worldline SIPS.""",
+Implements the Worldline SIPS API for payment acquirers.
+Other SIPS providers may be compatible, though this is
+not guaranteed.""",
     'depends': ['payment'],
     'data': [
         'views/payment_views.xml',

addons/payment_sips/models/payment.py

@@ -51,7 +51,8 @@ class AcquirerSips(models.Model):
     sips_secret = fields.Char('Secret Key', size=64, required_if_provider='sips', groups='base.group_user')
     sips_test_url = fields.Char("Test url", required_if_provider='sips', default='https://payment-webinit.simu.sips-atos.com/paymentInit')
     sips_prod_url = fields.Char("Production url", required_if_provider='sips', default='https://payment-webinit.sips-atos.com/paymentInit')
-    sips_version = fields.Char("Interface Version", required_if_provider='sips', default='HP_2.3')
+    sips_version = fields.Char("Interface Version", required_if_provider='sips', default='HP_2.31')
+    sips_key_version = fields.Char("Security Key Version", required_if_provider='sips', default="2.0")
 
     def _sips_generate_shasign(self, values):
         """ Generate the shasign for incoming or outgoing communications.

addons/payment_sips/views/payment_views.xml

@@ -14,6 +14,7 @@
                         <field name="sips_test_url" attrs="{'required':[ ('provider', '=', 'sips'), ('state', '!=', 'disabled')]}" groups='base.group_no_one'/>
                         <field name="sips_prod_url" attrs="{'required':[ ('provider', '=', 'sips'), ('state', '!=', 'disabled')]}" groups='base.group_no_one'/>
                         <field name="sips_version" attrs="{'required':[ ('provider', '=', 'sips'), ('state', '!=', 'disabled')]}" groups='base.group_no_one'/>
+                        <field name="sips_key_version" attrs="{'required':[ ('provider', '=', 'sips'), ('state', '!=', 'disabled')]}" groups='base.group_no_one'/>
                     </group>
                 </xpath>
             </field>