Add titles to "Update Lease" and "Update Host" forms

This presents a more uniform style when looking at the modal forms.

Change-Id: If162ce4c2fcda845d7e233bb52669aeab2d73df5

blazar_dashboard/content/hosts/views.py

@@ -55,6 +55,7 @@ class UpdateView(forms.ModalFormView):
     form_class = project_forms.UpdateForm
     template_name = 'admin/hosts/update.html'
     success_url = reverse_lazy('horizon:admin:hosts:index')
+    modal_header = _("Update Host")
 
     def get_initial(self):
         initial = super(UpdateView, self).get_initial()

blazar_dashboard/content/leases/views.py

@@ -61,6 +61,7 @@ class UpdateView(forms.ModalFormView):
     form_class = project_forms.UpdateForm
     template_name = 'project/leases/update.html'
     success_url = reverse_lazy('horizon:project:leases:index')
+    modal_header = _("Update Lease")
 
     def get_initial(self):
         initial = super(UpdateView, self).get_initial()