Stress improts

* Partial relative import fix
* Wildcard imports removed
* stress/utils/util.py renamed to stress/utils.py
* time/datetime module aliasing removed

Change-Id: Ib0b234581695604c10c51915210e4643a8732874
diff --git a/stress/tests/user_script_sample.py b/stress/tests/user_script_sample.py
index 04163e3..d941ea0 100644
--- a/stress/tests/user_script_sample.py
+++ b/stress/tests/user_script_sample.py
@@ -14,10 +14,12 @@
 """Sample stress test that creates a few virtual machines and then
 destroys them"""
 
+import datetime
 
-from stress.test_servers import *
 from stress.basher import BasherAction
-from stress.driver import *
+from stress.driver import bash_openstack
+from stress.test_servers import TestCreateVM
+from stress.test_servers import TestKillActiveVM
 from tempest import clients
 
 choice_spec = [