revive integration tests

tests/integration/rancherostest/util.py

@@ -3,6 +3,9 @@ import subprocess
 import time
 
 
+def iter_lines(s):
+    return iter(s.readline, '')
+
 def run_qemu(request, run_args=[]):
     subprocess.check_call('rm -f ./state/empty-hd.img', shell=True)
     print('\nrm ./state/*')