simulation: use proxy roles and guards for Delivery_getSolverProcess

Solve divergence dialog was raising unauthorized error when new solver process was created
by this script (when called with someone who was not manager). Therefore use proxy role and
protect call with "View" permission. View is used instead of modify portal content since we could
imagine cases where user might need to solve divergence even though is has no right to modify
delivery.

bt5/erp5_simulation/SkinTemplateItem/portal_skins/erp5_simulation/Delivery_getSolverProcess.xml

@@ -67,6 +67,20 @@ return solver_process\n
             <key> <string>_params</string> </key>
             <value> <string></string> </value>
         </item>
+        <item>
+            <key> <string>_proxy_roles</string> </key>
+            <value>
+              <tuple>
+                <string>Manager</string>
+              </tuple>
+            </value>
+        </item>
+        <item>
+            <key> <string>guard</string> </key>
+            <value>
+              <persistent> <string encoding="base64">AAAAAAAAAAI=</string> </persistent>
+            </value>
+        </item>
         <item>
             <key> <string>id</string> </key>
             <value> <string>Delivery_getSolverProcess</string> </value>
@@ -74,4 +88,21 @@ return solver_process\n
       </dictionary>
     </pickle>
   </record>
+  <record id="2" aka="AAAAAAAAAAI=">
+    <pickle>
+      <global name="Guard" module="Products.DCWorkflow.Guard"/>
+    </pickle>
+    <pickle>
+      <dictionary>
+        <item>
+            <key> <string>permissions</string> </key>
+            <value>
+              <tuple>
+                <string>View</string>
+              </tuple>
+            </value>
+        </item>
+      </dictionary>
+    </pickle>
+  </record>
 </ZopeData>