Description of problem:
When importing an image as a template from Glance via the REST API, the template's name is ignored and a default one is generated.

There are two URLs that can be used to import the image via the REST API:
1. .../api/storagedomains/<domain_id>/images/<image_id>/import
2. .../api/openstackimageproviders/<provider_id>/images/<image_id>/import

The first option works, the second doesn't.

Version-Release number of selected component (if applicable):
6e601c1586eccfd16b0416f57e1d71e79ef2098b

How reproducible:
100%

Steps to Reproduce:
Using a URL of the form:
".../api/openstackimageproviders/<provider_id>/images/<image_id>/import"
Send a post request:
<action>
  <storage_domain id="<domain_id>"/>
  <cluster id="<cluster_id>"/>
  <import_as_template>true</import_as_template>
  <template><name>template_name</name></template>
  <disk><alias>alias</alias></disk>
</action>

Actual results:
A new default template's name is generated, something that looks like "GlanceTemplate-<7_GUID_chars>".

Expected results:
The template's name should be "template_name".