Description of problem:
virt-manager doesn't honour storage pool's permission when creating a new volume 

Version-Release number of selected component (if applicable):
Red Hat Enterprise Linux Server release 6.0
libvirt-0.8.1-27.el6.x86_64
virt-manager-0.8.4-8.el6

How reproducible:
100%

Steps to Reproduce:
1. create a new storage pool in virt-manager 
2. change the permission section in xml:
# cat /etc/libvirt/storage/images-cloud.xml
<pool type='dir'>
<name>images-cloud</name>
<uuid>aebd3a39-cf7b-0c61-a814-ccc7cc69882f</uuid>
<capacity>0</capacity>
<allocation>0</allocation>
<available>0</available>
<source>
</source>
<target>
<path>/home/cloudadmin/images</path>
<permissions>
<mode>0770</mode>
<owner>500</owner> (changed default "-1" to 500. 500 is the uid for test user cloudadmin.)
<group>500</group>
</permissions>
</target>
</pool>

3. restart libvirtd
4. create a new volume in the pool via virt-manager 
  
Actual results:
The owner and group of the image file still shows as root. The mode tag also has no effect.

$ ll /home/cloudadmin/images/
total 136
-rw-------. 1 root root 1048576000 Feb  12 22:51 dfdsf.img
-rw-------. 1 root root     262144 Feb  12 21:18 fdfs.img

Expected results:
The owner, group of the image files should be cloudadmin instead of root and the permission should be 0770, instead of 0600. 


Additional info:
It works well when I use virsh to create storage pool/volume:
[root@dhcp-129-118 storage]# cat test-pool.xml 
<pool type='dir'>
  <name>test-pool</name>
  <uuid>a4e36700-90ed-f0d6-a731-722a708eece8</uuid>
  <capacity>0</capacity>
  <allocation>0</allocation>
  <available>0</available>
  <source>
  </source>
  <target>
    <path>/var/lib/libvirt/images/test-pool</path>
    <permissions>
      <mode>0700</mode>
      <owner>500</owner>
      <group>500</group>
    </permissions>
  </target>
</pool>
[root@dhcp-129-118 storage]# virsh pool-define test-pool.xml 
Pool test-pool defined from test-pool.xml

[root@dhcp-129-118 storage]# virsh pool-list --all
Name                 State      Autostart 
-----------------------------------------
default              active     yes       
test-pool            inactive   no        

[root@dhcp-129-118 storage]# virsh pool-build test-pool
Pool test-pool built

[root@dhcp-129-118 storage]# ls -ldn /var/lib/libvirt/images/test-pool/
drwx------. 2 500 500 4096 Feb 14 16:05 /var/lib/libvirt/images/test-pool/

[root@dhcp-129-118 storage]# virsh pool-start test-pool
Pool test-pool started

[root@dhcp-129-118 storage]# cat test.xml 
<volume>
  <name>test.img</name>
  <key>/var/lib/libvirt/images/test-pool/test.img</key>
  <source>
  </source>
  <capacity>10485760</capacity>
  <allocation>0</allocation>
  <target>
    <path>/var/lib/libvirt/images/test-pool/test.img</path>
    <format type='raw'/>
    <permissions>
      <mode>0666</mode>
      <owner>500</owner>
      <group>500</group>
      <label>unconfined_u:object_r:virt_image_t:s0</label>
    </permissions>
  </target>
</volume>

[root@dhcp-129-118 storage]# virsh vol-create test-pool test.xml 
Vol test.img created from test.xml
[root@dhcp-129-118 storage]# ls -ln /var/lib/libvirt/images/test-pool/test.img 
-rw-rw-rw-. 1 500 500 10485760 Feb 14 16:08 /var/lib/libvirt/images/test-pool/test.img