Don't check return status from smartctl -a

Some devices don't support SMART capability and getting information
from such devices returns an error code 4. As it happens in CI we remove
the check of the return code knowing that this error code is a field
of the JSON output.

Signed-off-by: Guillaume <[email protected]>

SOURCES/etc/xapi.d/plugins/smartctl.py

@@ -24,7 +24,7 @@ def get_information(session, args):
     with OperationLocker():
         disks = _list_disks()
         for disk in disks:
-            cmd = run_command(["smartctl", "-j", "-a", disk])
+            cmd = run_command(["smartctl", "-j", "-a", disk], check=False)
             results[disk] = json.loads(cmd['stdout'])
         return json.dumps(results)