saltwrapper: Consider only disk and part devices
saltwrapper: Consider only disk and part devices

While finding the disk details of the storage nodes
consider only disk and part type of devices.

Bug-URL: https://bugzilla.redhat.com/1366620
Change-Id: I1db0306d5bda1961b0b3f01d1ba45a678d4ded8a
Signed-off-by: Shubhendu <abf833e62503b33bb0dfae62bb381d87d91f8de1@redhat.com>

skyrings/skyring,skyrings/skyring,skyrings/skyring,skyrings/skyring