[IMP] util/domains: hide deprecation warnings

This is noise in the upgrade logs since we intentionally use the tools
from `expression`.

closes #204

Signed-off-by: Christophe Simonis (chs) <[email protected]>

Author: aj-fuentes

src/util/domains.py

@@ -3,6 +3,7 @@
 import functools
 import logging
 import re
+import warnings
 
 import lxml
 
@@ -92,6 +93,7 @@ def is_leaf(leaf):
     AND_OPERATOR = expression.AND_OPERATOR
     OR_OPERATOR = expression.OR_OPERATOR
     DOMAIN_OPERATORS = expression.DOMAIN_OPERATORS
+    warnings.filterwarnings("ignore", message=r"Since 19\.0, use Domain\(\) object", category=DeprecationWarning)
     normalize_domain = expression.normalize_domain
     normalize_leaf = expression.normalize_leaf
     is_leaf = expression.is_leaf