configurator_standard_trade_template: enable "Accept" solver on specialise divergences

Changing the trade condition can impact the business process and generate a
completly different simulation, so ask user instead of just silently accepting.

bt5/erp5_configurator_standard_trade_template/PathTemplateItem/portal_rules/new_delivery_simulation_rule/specialise_tester.xml

@@ -18,6 +18,14 @@
               <persistent> <string encoding="base64">AAAAAAAAAAM=</string> </persistent>
             </value>
         </item>
+        <item>
+            <key> <string>categories</string> </key>
+            <value>
+              <tuple>
+                <string>solver/portal_solvers/Accept Solver</string>
+              </tuple>
+            </value>
+        </item>
         <item>
             <key> <string>description</string> </key>
             <value>