Fix names: rename types to type_def

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

test/functional/tests/basic/test_start_cas.py

@@ -9,7 +9,7 @@ import pytest
 from api.cas import casadm
 from core.test_run import TestRun
 from storage_devices.disk import DiskTypeSet, DiskType, DiskTypeLowerThan
-from types.size import Size, Unit
+from type_def.size import Size, Unit
 
 
 @pytest.mark.CI