Steps to reproduce:

1. make `configuration.export` call to host with disabled inventory 

Result:
Json blob that looks like the following:

zabbix_export: {
...
macros: [],
inventory: [],
...
}

Expected:

zabbix_export: {
...
macros: [],
inventory: {}, 
...
}

The main issue here is when an inventory is returned it is expected to just be a map of string:value. Though when it is disabled it just returns an empty array which is a totally different type than when an inventory is found. So if you are preforming a bulk operation on hosts that could/couldnt have inventory setup you cannot load it into a struct similar to below even if you are omitting the empty field because the types are different :

type Host struct {
   Host string `json:"host"`
   Name string `json:"name"`
   Description string `json:"description,omitempty"`
   Inventory Inventory `json:"inventory,omitempty"`
}

type Inventory struct {
   Name string `json:"name,omitempty"`
}

The error you receive when trying to load host with inventory disabled:

json: cannot unmarshal array into Go struct field Host.inventory of type v1.Inventory