Updatelayers command ignores group layers in workspace in Geoserver

[saxas13]

Expected Behavior

After creating a group layer in Geoserver within the geonode workspace and running the management command updatelayers "-w geonode" the group layer is visible in GeoNode

Actual Behavior

The process does not recognise any group layers and adds nothing to the layer list in GeoNode.

Steps to Reproduce the Problem

1. Create a group layer in Geoserver based on already published layers, select workspace = geonode
2. Run updatelayers command to sync GeoServer and GeoNode (either with the management command from admin panel or from server side (i.e. inside django4geonode container)
3. See that the group layer will be ignored and not added

Specifications

• GeoNode version: 3.3.0
• Installation type (vanilla, geonode-project): vanilla
• Installation method (manual, docker): docker
• Platform: Ubuntu 20.08
• Additional details: updatelayers added group layers successfull with 3.1 branch