+++ This bug was initially created as a clone of Bug #1110798 +++

Description of problem:
When trying to create a template from SDK or REST api, there is an option to select the alias of the template's disk.

In REST (for example):
<template>
<name>temp_from_1</name>
<vm id='4c5d042e-bd34-4280-a0eb-2985863ffb15'>
    <disks>
        <disk id='2b997211-ad7a-48ba-b2f0-cf3264ea4447'>
           <alias>new_name</alias>
         </disk>
    </disks>
</vm>
</template>

The new created template id is: 15c4415c-205d-474d-a626-6b7c29caac94

The response: in /api/templates/15c4415c-205d-474d-a626-6b7c29caac94/disks


<disk href= "/api/templates/15c4415c-205d-474d-a626-6b7c29caac94/disks/50bfde29-379b-4cdf-b629-e2538f4464c1" id="50bfde29-379b-4cdf-b629-e2538f4464c1">
<actions>
<link href= "/api/templates/15c4415c-205d-474d-a626-6b7c29caac94/disks/50bfde29-379b-4cdf-b629-e2538f4464c1/export" rel="export"/>
<link href= "/api/templates/15c4415c-205d-474d-a626-6b7c29caac94/disks/50bfde29-379b-4cdf-b629-e2538f4464c1/copy" rel="copy"/>
</actions>
<name>vm_99_Disk1</name>   ********* NOT AS EXPECTED *********
<template href= "/api/templates/15c4415c-205d-474d-a626-6b7c29caac94" id="15c4415c-205d-474d-a626-6b7c29caac94"/>
<alias>vm_99_Disk1</alias>
<image_id>eb6bfa68-bfbe-48ba-aa62-3377105383b6</image_id>
<storage_domains>
<storage_domain id="5b5b33a0-ca1f-476f-82f0-ccb06437283b"/>
</storage_domains>
<provisioned_size>5368709120</provisioned_size>
<actual_size>1073741824</actual_size>
<status>
<state>ok</state>
</status>
</disk>


Version-Release number of selected component (if applicable):
ovirt-engine-3.5.0-0.0.master.20140605145557.git3ddd2de.el6.noarch

How reproducible:
100%

Steps to Reproduce:
1. POST in /api/templates/ :
1.1  
<template>
<name>temp_from_1</name>
<vm id={vm_id}>
    <disks>
        <disk id={disk_id}>
           <alias>new_name</alias>
         </disk>
    </disks>
</vm>
</template>

2. Check the response body
3.

Actual results:
In the response body under the vm_id/disks, check the newly created disk's alias

Expected results:
the disk's alias should be like the alias that sent in the request body

Additional info:

--- Additional comment from Amit Aviram on 2015-02-16 11:05:04 IST ---

This is actually a wider bug than what is described- Any field which is specified in the REST XML regarding the new template's disks is ignored.

--- Additional comment from Amit Aviram on 2015-03-08 16:34:44 IST ---

The patch added now makes the REST request for a new template to be correlated with the rsdl_metadata file, which specifies what can be posted and what not.

Disk's alias is now specified there and can be changed via REST.
===============================================================================
This is a clone for RHEV so that REHV's docs can pick up the doctext too.