lvm api (ocl)

Signed-off-by: Karolina Rogowska <karolina.rogowska@intel.com>

test/functional/tests/conftest.py

@@ -29,6 +29,7 @@ from test_tools.mdadm import Mdadm
 from test_tools.fs_utils import remove
 from log.logger import create_log, Log
 from test_utils.singleton import Singleton
+from storage_devices.lvm import Lvm, LvmConfiguration
 
 
 class Opencas(metaclass=Singleton):
@@ -244,6 +245,11 @@ def base_prepare(item):
         if Drbd.is_installed():
             __drbd_cleanup()
 
+        lvms = Lvm.discover()
+        if lvms:
+            Lvm.remove_all()
+            LvmConfiguration.remove_filters_from_config()
+
         raids = Raid.discover()
         for raid in raids:
             # stop only those RAIDs, which are comprised of test disks