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/sms/mo_mt_sms.py b/suites/sms/mo_mt_sms.py
index 4e0ba08..f729f99 100755
--- a/suites/sms/mo_mt_sms.py
+++ b/suites/sms/mo_mt_sms.py
@@ -1,5 +1,5 @@
 #!/usr/bin/env python3
-from osmo_gsm_tester.test import *
+from osmo_gsm_tester.testenv import *
 
 nitb = suite.nitb()
 bts = suite.bts()