Disk finder refactor

Signed-off-by: Katarzyna Treder <katarzyna.treder@h-partners.com>

test/functional/tests/conftest.py

@@ -25,7 +25,6 @@ from storage_devices.raid import Raid
 from storage_devices.ramdisk import RamDisk
 from test_tools.os_tools import kill_all_io
 from test_tools.udev import Udev
-from test_utils.disk_finder import get_disk_serial_number
 from test_tools.disk_utils import PartitionTable, create_partition_table
 from test_tools.device_mapper import DeviceMapper
 from test_tools.mdadm import Mdadm
@@ -34,6 +33,7 @@ from test_tools import initramfs, git
 from log.logger import create_log, Log
 from test_utils.common.singleton import Singleton
 from storage_devices.lvm import Lvm, LvmConfiguration
+from storage_devices.disk import Disk
 
 
 def pytest_addoption(parser):
@@ -185,7 +185,7 @@ def base_prepare(item):
 
         RamDisk.remove_all()
         for disk in TestRun.disks.values():
-            disk_serial = get_disk_serial_number(disk.path)
+            disk_serial = Disk.get_disk_serial_number(disk.path)
             if disk.serial_number and disk.serial_number != disk_serial:
                 raise Exception(
                     f"Serial for {disk.path} doesn't match the one from the config."