tests: Replace 'suite' with 'tenv'

Change-Id: I777ec59ffd83b861ddc09e85e52d7a8896264b8c
diff --git a/selftest/suite_test/test_suite/test_error.py b/selftest/suite_test/test_suite/test_error.py
index 70d14a1..6a258e3 100755
--- a/selftest/suite_test/test_suite/test_error.py
+++ b/selftest/suite_test/test_suite/test_error.py
@@ -1,5 +1,5 @@
 from osmo_gsm_tester.testenv import *
 
-print('I am %r / %r' % (suite.suite().name(), test.name()))
+print('I am %r / %r' % (tenv.suite().name(), test.name()))
 
 assert False