ovirt_disk: Fix issue in detaching the direct LUN

The direct LUN doesn't have a disk profile and follow_link(self._connection, entity.disk_profile
) will be None. So detaching the LUN will fail with error "'NoneType' object has no attribute 'name'".

Signed-off-by: Nijin Ashok <nashok@redhat.com>

changelogs/fragments/700-fix-directlun.yml

@@ -0,0 +1,3 @@
+---
+bugfixes:
+      - ovirt_disk -  Fix issue in detaching the direct LUN (https://github.com/oVirt/ovirt-ansible-collection/pull/700)

plugins/modules/ovirt_disk.py

@@ -731,7 +731,7 @@ def update_check(self, entity):
             equal(self.param('propagate_errors'), entity.propagate_errors) and
             equal(otypes.ScsiGenericIO(self.param('scsi_passthrough')) if self.param('scsi_passthrough') else None, entity.sgio) and
             equal(self.param('wipe_after_delete'), entity.wipe_after_delete) and
-            equal(self.param('profile'), follow_link(self._connection, entity.disk_profile).name)
+            equal(self.param('profile'), getattr(follow_link(self._connection, entity.disk_profile), 'name', None))
         )