add info about bluestore to disklist

this patch adds information about bluestore/db/wal to the disklist,
and we set the journal count only when we have at least one journal on
the disk

also adapt the regression tests

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

test/disk_tests/ssd_smart/disklist_expected.json

@@ -5,7 +5,6 @@
 	"rpm" : 0,
 	"gpt" : 1,
 	"health" : "PASSED",
-	"journals" : 0,
 	"wearout" : "100",
 	"osdid" : -1,
 	"size" : 512000,
@@ -26,7 +25,6 @@
 	"vendor" : "ATA",
 	"serial" : "000000000000000000",
 	"wearout" : "97",
-	"journals" : 0,
 	"health" : "PASSED"
     },
     "sdc" : {
@@ -37,7 +35,6 @@
 	"type" : "ssd",
 	"size" : 512000,
 	"wearout" : "99",
-	"journals" : 0,
 	"health" : "PASSED",
 	"gpt" : 1,
 	"rpm" : 0,
@@ -49,7 +46,6 @@
 	"gpt" : 1,
 	"serial" : "000000000000",
 	"vendor" : "ATA",
-	"journals" : 0,
 	"wearout" : "100",
 	"health" : "PASSED",
 	"devpath" : "/dev/sdd",
@@ -71,7 +67,6 @@
 	"gpt" : 1,
 	"rpm" : 0,
 	"health" : "PASSED",
-	"wearout" : "91",
-	"journals" : 0
+	"wearout" : "91"
     }
 }