Ignore TripleDES python-cryptography import warnings

TripleDES will be deprecated in python-cryptography 48.0.0. We
have code that uses it if it is available and otherwise ignores
it.

Because this gets imports in constants.py this warning is promiment
pretty much everywhere. So let's ignore it since we already handle
the issue.

Related: https://pagure.io/freeipa/issue/9641

Signed-off-by: Rob Crittenden <rcritten@redhat.com>
Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>

ipalib/constants.py

@@ -25,6 +25,14 @@ All constants centralised in one file.
 import os
 import string
 import uuid
+import warnings
+
+warnings.filterwarnings(
+    "ignore",
+    "TripleDES has been moved to "
+    "cryptography.hazmat.decrepit.ciphers.algorithms.TripleDES and "
+    "will be removed from this module in 48.0.0",
+    category=UserWarning)
 
 from ipaplatform.constants import constants as _constants
 from ipapython.dn import DN