docs: storage: owner/group default to libvirtd UID/GID

Commit fafcc818 changed the docs to say that when creating a
pool directory or file volume with no owner/group specified, they
will be inherited from the parent directory. This isn't correct
now and doesn't seem to have ever been correct

In reality default owner/group is whatever UID/GID libvirtd is
running as
Signed-off-by: NCole Robinson <crobinso@redhat.com>

docs/formatstorage.html.in

@@ -478,8 +478,8 @@
         The <code>owner</code> element contains the numeric user ID.
         The <code>group</code> element contains the numeric group ID.
         If <code>owner</code> or <code>group</code> aren't specified when
-        creating a directory, the values are inherited from the parent
-        directory. The <code>label</code> element contains the MAC (eg SELinux)
+        creating a directory, the UID and GID of the libvirtd process are used.
+        The <code>label</code> element contains the MAC (eg SELinux)
         label string.
         <span class="since">Since 0.4.1</span>
         For running directory or filesystem based pools, these fields
@@ -776,8 +776,8 @@
         The <code>owner</code> element contains the numeric user ID.
         The <code>group</code> element contains the numeric group ID.
         If <code>owner</code> or <code>group</code> aren't specified when
-        creating a supported volume, the values are inherited from the parent
-        directory. The <code>label</code> element contains the MAC (eg SELinux)
+        creating a supported volume, the UID and GID of the libvirtd process
+        are used. The <code>label</code> element contains the MAC (eg SELinux)
         label string.
         For existing directory or filesystem based volumes, these fields
         will be filled with the values used by the existing file.