Description of problem:
When trying to delete a storage domain using the REST API, the return code is 400 and the response body is:
<fault>
    <reason>host parameter is missing</reason>
</fault>

The call is - DELETE ovirt-engine/api/storagedomains/3c0a32b7-0ec1-4dd5-a1e4-54156a4753b4 body:
<storage_domain>
    <host id="724a18e4-bd69-42d9-a547-9f3aece0d0f4"/>
    <format>true</format>
</storage_domain>

* Same result even without <format>true</format>

In rsdl, the parameter set is:
<parameters_set>
 <parameter required="false" type="xs:boolean" context="matrix">
  <name>force</name>
  <value>true|false</value>
 </parameter>
 <parameter required="true" type="xs:string" context="matrix">
  <name>destroy</name>
  <value>the id or name of the host</value>
 </parameter>
 <parameter required="false" type="xs:boolean" context="matrix">
  <name>async</name>
  <value>true|false</value>
 </parameter>
</parameters_set>

So it seems there is a problem here as well (the parameter name is 'destroy' instead of host), so I tried 'destroy' instead of 'host' just to check it that's the bug but the behavior is the same

No logs attached because the request don't even get's to the engine 


Version-Release number of selected component (if applicable):
ovirt-engine-4.0.0-0.7.master.el7ev.noarch


How reproducible:
100%

Steps to Reproduce:
- Have a detached storage domain
1. Send DELETE request to ovirt-engine/api/storagedomains/<sd_id> with body:
<storage_domain>
    <host id="724a18e4-bd69-42d9-a547-9f3aece0d0f4"/>
    <format>true</format>
</storage_domain>
2.
3.

Actual results:
return code 400
<fault>
    <reason>host parameter is missing</reason>
</fault>

Expected results:


Additional info: