tests: Replace 'suite' with 'tenv'

Change-Id: I777ec59ffd83b861ddc09e85e52d7a8896264b8c
diff --git a/selftest/suite_test/test_suite/hello_world.py b/selftest/suite_test/test_suite/hello_world.py
index a69f95a..81a9624 100644
--- a/selftest/suite_test/test_suite/hello_world.py
+++ b/selftest/suite_test/test_suite/hello_world.py
@@ -1,5 +1,5 @@
 from osmo_gsm_tester.testenv import *
 
 print('hello world')
-print('I am %r / %r' % (suite.suite().name(), test.name()))
+print('I am %r / %r' % (tenv.suite().name(), test.name()))
 print('one\ntwo\nthree')