refactor(itim): Update Test Suite for TicketRequest model

ref: #871 closes #867

app/itim/models/request_ticket.py

@@ -6,6 +6,8 @@ class RequestTicket(
     SLMTicket
 ):
 
+    _is_submodel = True
+
 
     class Meta:
 

app/itim/tests/unit/ticket_request/conftest.py

@@ -18,6 +18,3 @@ def model_kwargs(request, kwargs_requestticket):
     request.cls.kwargs_create_item = kwargs_requestticket.copy()
 
     yield kwargs_requestticket.copy()
-
-    if hasattr(request.cls, 'kwargs_create_item'):
-        del request.cls.kwargs_create_item

app/itim/tests/unit/ticket_request/test_unit_ticket_request_model.py

@@ -35,7 +35,7 @@ class RequestTicketTestCases(
             },
             'url_model_name': {
                 'type': str,
-                'value': 'ticket'
+                'value': 'ticketbase'
             },
         }