Fix getting version number in tests

Maksim Milyutin · Maksim Milyutin · commit effb898bcb7d · 2016-11-01T12:07:26.000+03:00
diff --git a/tests/partitioning_test.py b/tests/partitioning_test.py
@@ -419,8 +419,8 @@ def test_parallel_nodes(self):
 
         # Check version of postgres server
         # If version < 9.6 skip all tests for parallel queries
-        version = node.execute("postgres", "show server_version_num")
-        if int(version[0][0]) < 90600:
+        version = node.psql("postgres", "show server_version_num")
+        if int(version[1]) < 90600:
             return
 
         # Prepare test database
