Migrate cvp-sanity to Python3

* use print function from future
* convert dict keys and values to list
* do not use bunch imports
* fix requirements mismatch
Related: PROD-33849

Change-Id: Ifecc3a9dcdcfe3243f7dcf2c709a80e9a7c765a1
diff --git a/test_set/cvp-sanity/tests/test_galera_cluster.py b/test_set/cvp-sanity/tests/test_galera_cluster.py
index 32b1074..dc665e7 100644
--- a/test_set/cvp-sanity/tests/test_galera_cluster.py
+++ b/test_set/cvp-sanity/tests/test_galera_cluster.py
@@ -1,3 +1,4 @@
+from builtins import str
 import pytest
 
 
@@ -18,7 +19,7 @@
     size_cluster = []
     amount = len(gs)
 
-    for item in gs.values():
+    for item in list(gs.values()):
         size_cluster.append(item.split('\n')[-1].strip())
 
     assert all(item == str(amount) for item in size_cluster), \