Correct utils in the reverted files

Author: garciadias

tests/bundle/test_bundle_ckpt_export.py

@@ -21,7 +21,7 @@
 from monai.bundle import ConfigParser
 from monai.data import load_net_with_metadata
 from monai.networks import save_state
-from tests.utils import command_line_tests, skip_if_windows
+from tests.util import command_line_tests, skip_if_windows
 
 TEST_CASE_1 = ["", ""]