Fix black and cover errors

Change-Id: I1c7fb47a94ac0ce99c5b6fffb44aca3d80cd3842
Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>
diff --git a/tox.ini b/tox.ini
index 4844552..4679635 100644
--- a/tox.ini
+++ b/tox.ini
@@ -50,7 +50,7 @@
         coverage report --omit='*tests*'
         coverage html -d ./cover --omit='*tests*'
         coverage xml -o coverage.xml --omit=*tests*
-whitelist_externals = sh
+allowlist_externals = sh
 
 
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