No filtering by account when finding by hostname or ID

[Glutexo]

When hosts are filtered by the hostname_or_id parameter, they are not filtered by account number. The condition simply isn’t there. An account_number argument is passed, but it’s not used.

Steps to reproduce:

1. Create a host with one account number. (Here: abc123)

   POST http://localhost:8080/r/insights/platform/inventory/api/v1/hosts
   Content-Type: application/json
   x-rh-identity: eyJpZGVudGl0eSI6eyJhY2NvdW50X251bWJlciI6ImFiYzEyMyIsIm9yZ19pZCI6ImJjZDIzNCJ9fQ==
   

   [
     {
       "account": "abc123",
       "fqdn": "some.thing.cz"
     }
   ]

2. Query for this hosts using a different account number. (Here: 0000001)

   GET http://localhost:8080/r/insights/platform/inventory/api/v1/hosts?hostname_or_id=some.thing.cz
   x-rh-identity: eyJpZGVudGl0eSI6eyJhY2NvdW50X251bWJlciI6IjAwMDAwMDEifX0=
   

3. See that the host is retrieved.

   {
     "count": 1,
      "page": 1,
     "per_page": 50,
     "results": [
       {
         "account": "abc123",
         "bios_uuid": null,
         "created": "2019-03-18T12:47:28.151448Z",
         "display_name": "some.thing.cz",
         "external_id": null,
         "facts": [],
         "fqdn": "some.thing.cz",
         "id": "e6e717fb-eba2-47c7-ac00-a37532e33ce2",
         "insights_id": null,
         "ip_addresses": null,
         "mac_addresses": null,
         "rhel_machine_id": null,
         "satellite_id": null,
         "subscription_manager_id": null,
         "updated": "2019-03-18T12:47:28.151468Z"
       }
     ],
     "total": 1
   }