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/selftest/suite_test/test_suite/test_fail.py b/selftest/suite_test/test_suite/test_fail.py
index 6880c81..cbaeded 100755
--- a/selftest/suite_test/test_suite/test_fail.py
+++ b/selftest/suite_test/test_suite/test_fail.py
@@ -1,5 +1,5 @@
 #!/usr/bin/env python3
-from osmo_gsm_tester.test import *
+from osmo_gsm_tester.testenv import *
 
 print('I am %r / %r' % (suite.name(), test.name()))