add sas regression tests

Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>

test/disk_tests/sas/disklist_expected.json

@@ -0,0 +1,17 @@
+{
+    "sda" : {
+	"gpt" : 1,
+	"devpath" : "/dev/sda",
+	"type" : "unknown",
+	"model" : "MODEL1",
+	"health" : "UNKNOWN",
+	"osdid" : -1,
+	"journals" : 0,
+	"wwn" : "0x0000000000000000",
+	"vendor" : "VENDOR1",
+	"rpm" : -1,
+	"size" : 5120000,
+	"serial" : "SER2",
+	"wearout" : "N/A"
+    }
+}