return more context for bulk host create
now return list of minimal info about host objects
[
{
"name": "lakjdsafoiaweirnladlk",
"enabled": true,
"instance_id": "",
"description": "",
"variables": "",
"id": 4593,
"url": "/api/v2/hosts/4593/",
"inventory": "/api/v2/inventories/1/"
}
]
Updated tests, but needed to work around some weird behavior with
sqlite. Apparently it behaves differently around assigning ID's to the
result of bulk_create and that is messed up my use of `reverse` to look
up the url of the hosts