Raise admin_node_memory to 4GB
Raise admin_node_memory to 4GB

This change is needed because the puma server needs already 1GB while
the start. This amount raises while the first reqests due do caches and
requires.

vmoravec/automation,gosipyan/automation,aspiers/automation,vmoravec/automation,SUSE-Cloud/automation,vmoravec/automation,aspiers/automation,aspiers/automation,vmoravec/automation,SUSE-Cloud/automation,gosipyan/automation,SUSE-Cloud/automation,gosipyan/automation,gosipyan/automation,SUSE-Cloud/automation,aspiers/automation