slapos_subscription_request: only add a project assignment for the existing admin user

master/bt5/slapos_subscription_request/TestTemplateItem/portal_components/test.erp5.testSlapOSSubscriptionScenario.py

@@ -202,13 +202,6 @@ return dict(vads_url_already_registered="%s/already_registered" % (payment_trans
       admin_user.newContent(
         portal_type="ERP5 Login",
         reference="admin_user").validate()
-
-      admin_user.newContent(
-        portal_type='Assignment',
-        destination_project_value=project,
-        function='computer/manager'
-      ).open()
-
       admin_user.edit(
         first_name="Admin User",
         reference="Admin_user",
@@ -216,9 +209,18 @@ return dict(vads_url_already_registered="%s/already_registered" % (payment_trans
       )
 
       admin_user.validate()
-      self.admin_user = admin_user
+
     else:
-      self.admin_user = admin_user_login.getParentValue()
+      admin_user = admin_user_login.getParentValue()
+
+    admin_user.newContent(
+      portal_type='Assignment',
+      destination_project_value=project,
+      function='computer/manager'
+    ).open()
+
+    self.admin_user = admin_user
+
 
   def createNormalUser(self, email, name, language):
     """ Create a Normal user """