Default model and version makes it impossible to fetch all templates

[frhvi1]

When fetching templates for a group I copied the example task:
#Usage Examples

• name: Get all templates in a given group
  central_templates:
  action: get_all
  group_name: TEST_GROUP
  limit: 20
  offset: 0

But due to the default values being set to "ALL":
version=dict(required=False, type='str', default="ALL"),
model=dict(required=False, type='str', default="ALL"),

It means the task becomes:

• name: Get all templates in a given group
  central_templates:
  action: get_all
  group_name: TEST_GROUP
  limit: 20
  offset: 0
  version: ALL
  model: ALL

and if you have templates that aren't set to "ALL", then it doesn't return those