tests: normalize "Python 2 is no longer supported" warnings from cryptography

slapos/recipe/template/tests.py

@@ -41,6 +41,8 @@ def setUp(test):
 
 normalize_setuptools_42 = re.compile(
     'WARNING: The easy_install command is deprecated and will be removed in a future version\\.\n'), ''
+normalize_cryptography_3_on_python2 = re.compile(
+    '.*CryptographyDeprecationWarning: Python 2 is no longer supported.*\n.*\n'), ''
 
 
 def test_suite():
@@ -53,6 +55,7 @@ def test_suite():
         testing.normalize_path,
         testing.not_found,
         normalize_setuptools_42,
+        normalize_cryptography_3_on_python2,
         )),
     ) for filename in [
       'README.txt',