Modify 0016-RH-retain_hwhandler.patch
* Check the dm-multipath module version, and don't enable
retain_attached_hw_handler if the kernel doesn't support it
Add 0019-RH-detect-prio.patch
* add detect_prio option, to make multipath check if the device
supports the ALUA prio, before defaulting to the configured prio
Remove 0017-RH-netapp_config.patch
Add 0020-RH-netapp-config.patch
* new netapp config that uses retain_attached_hw_handler and
detect_prio to autoconfigure ALUA and non-ALUA devices.
