Rename test module to testenv and update references

Preparation to move current Test class into its own module test from
suite module.

Change-Id: I520bd046cb09042b5567d967f951f050e4e02e85
diff --git a/suites/debug/fail.py b/suites/debug/fail.py
index 8e30578..a2d9e3a 100644
--- a/suites/debug/fail.py
+++ b/suites/debug/fail.py
@@ -1,5 +1,5 @@
 #!/usr/bin/env python3
-from osmo_gsm_tester.test import *
+from osmo_gsm_tester.testenv import *
 
 # This can be used to verify that a test failure is reported properly.
 test.set_fail('ExpectedFail', 'This failure is expected')