feat(itim): Services assignable to cluster

ref: #247 #125

app/itim/views/clusters.py

@@ -8,6 +8,7 @@ from core.views.common import AddView, ChangeView, DeleteView, IndexView
 
 from itim.forms.clusters import ClusterForm, DetailForm
 from itim.models.clusters import Cluster
+from itim.models.services import Service
 
 from settings.models.user_settings import UserSettings
 
@@ -159,6 +160,10 @@ class View(ChangeView):
 
         context['model_delete_url'] = reverse('ITIM:_cluster_delete', args=(self.kwargs['pk'],))
 
+        context['services'] = Service.objects.filter(
+            cluster = self.kwargs['pk']
+        )
+
 
         context['content_title'] = self.object.name