fix tests

Author: funbringer

tests_testgres/tests/bootstrap.py

@@ -1,5 +1,5 @@
 import unittest
-from cluster import Cluster
+from mm_cluster import Cluster
 
 
 class Bootstrap(unittest.TestCase):

tests_testgres/tests/truncate.py

@@ -2,7 +2,7 @@
 import subprocess
 import time
 
-from cluster import Cluster
+from mm_cluster import Cluster
 
 
 NUM_NODES = 2