iscsi: correctly install the timeout iscsiroot dummy call

initqueue parses $1 as the executable command

modules.d/95iscsi/parse-iscsiroot.sh

@@ -64,7 +64,7 @@ if [ -n "$iscsi_firmware" ] ; then
     netroot=${netroot:-iscsi:}
     modprobe -q iscsi_boot_sysfs 2>/dev/null
     modprobe -q iscsi_ibft
-    initqueue --onetime --timeout "/sbin/iscsiroot dummy '$netroot' '$NEWROOT'"
+    initqueue --onetime --timeout /sbin/iscsiroot dummy "'$netroot'" "'$NEWROOT'"
 fi
 
 # If it's not iscsi we don't continue