822 bulk import of device components (#3711)

Closes #822: CSV import for device components

* Implement CSV import for netbox-community#822

* Comment out default_return_url until there is a proper target

* Fix the default value of `enabled` when not included in the import

* rear_port is definitely required here

* Power Ports don't have a type (yet)

* Add import for console-ports and console-server-ports

* Add import for device-bays

netbox/ipam/forms.py

@@ -240,7 +240,7 @@ class RoleForm(BootstrapMixin, forms.ModelForm):
     class Meta:
         model = Role
         fields = [
-            'name', 'slug',
+            'name', 'slug', 'weight',
         ]