Bug 1255334

Description of problem:
when deleting watchdog entity via rest API you don't receive an xml respond, because 'application/xml is missing in the response headers   

* Example of the DELETE via res: 

DELETE
https://10.35.161.33/api/vms/b1669863-f65a-4090-be8b-252ad18725a9/watchdogs/00000000-0000-0000-0000-000000000000 

* Response headers :

Date: Thu, 20 Aug 2015 08:21:43 GMT 
Pragma: No-cache 
Cache-Control: no-cache 
Expires: Thu, 01 Jan 1970 02:00:00 IST 
Content-Type: */*  
 

Version-Release number of selected component (if applicable):
Red Hat Enterprise Virtualization Manager Version: 3.6.0-0.11.master.el6


How reproducible:
100%

Steps to Reproduce:
1.create vm with watchdog device 
2.try to delete watchdog device via rest API
3.

Actual results:

.Action
actions: null
brick: null
bricks: null
cluster: null
comment: null
connectivityTimeout: null
creationStatus: null
description: null
disk: null
disks: null
fault: null
fenceType: null
gracePeriod: null
host: null
hostNics: null
href: null
id: null
image: null
iscsi: null
job: {actions: null, comment: null, creationStatus: null, description: null, endTime: null,
  href: /ovirt-engine/api/jobs/e5213fc1-54aa-4baf-84ea-b6b7e61f02cc, id: e5213fc1-54aa-4baf-84ea-b6b7e61f02cc,
  lastUpdated: null, name: null, owner: null, startTime: null, status: null}
logicalUnits: null
modifiedBonds: null
modifiedLabels: null
modifiedNetworkAttachments: null
name: null
network: null
option: null
powerManagement: null
proxyTicket: null
reason: null
removedBonds: null
removedLabels: null
removedNetworkAttachments: null
resolutionType: null
rootPassword: null
snapshot: null
ssh: null
status: {detail: null, state: complete}
storageDomain: null
storageDomains: null
synchronizedNetworkAttachments: null
template: null
ticket: null
vm: null


Expected results:
the response should be xml

Additional info: