Description of problem:
ovirt_provider_ovn_vhostuser_hook.py and delete_vhostuserclient_hook.py calls `sudo ovs-vsctl`, but this is not allowed by the suders file.


Steps to Reproduce:
1. Uninstall vdsm-hook-openstacknet on a host
2. Start a VM with an ovn network on this host

Actual results:
Starting VM fails with:
 INFO  (vm/e54f8a2d) [root] /usr/libexec/vdsm/hooks/before_device_create/20_ovirt_provider_ovn_vhostuser_hook: rc=1 err=Traceback (most recent call last):
  File "/usr/libexec/vdsm/hooks/before_device_create/20_ovirt_provider_ovn_vhostuser_hook", line 134, in <module>
    main()
  File "/usr/libexec/vdsm/hooks/before_device_create/20_ovirt_provider_ovn_vhostuser_hook", line 120, in main
    if not is_netdev_datapath():
  File "/usr/libexec/vdsm/hooks/before_device_create/20_ovirt_provider_ovn_vhostuser_hook", line 110, in is_netdev_datapath
    data, headings = list_ovs_table('bridge')
  File "/usr/libexec/vdsm/hooks/before_device_create/20_ovirt_provider_ovn_vhostuser_hook", line 42, in list_ovs_table
    exec_cmd('ovs-vsctl', '--format=json', 'list', table)[0]
  File "/usr/libexec/vdsm/hooks/before_device_create/20_ovirt_provider_ovn_vhostuser_hook", line 36, in exec_cmd
    (args, err))
RuntimeError: Failed to execute ('ovs-vsctl', '--format=json', 'list', 'bridge'), due to: ['sudo: a password is required']
 (hooks:114)

Expected results:
VM starts

Additional info: