fix spec, add for sentinel

Change-Id: Ic4ff6ed0258d37b28bdd7fdb3002d98dd4593a5a

Author: zzzeek

tox.ini

@@ -39,9 +39,9 @@ deps=
     {memcached}: python-binary-memcached>=0.29.0
     {memcached}: pifpaf>=2.5.0
     {memcached}: pymemcache>=3.5.0
-    {redis}: redis!=4.3.2,4.3.3
+    {redis}: redis!=4.3.2,!=4.3.3
     {redis}: pifpaf
-    {redis_sentinel}: redis
+    {redis_sentinel}: redis!=4.3.2,!=4.3.3
     {redis_sentinel}: pifpaf
     {cov}: pytest-cov