tests: workaround 'int' name being shadowed by module name

qubes.tests.int shadows 'int' type in qubes.tests module.

QubesOS/qubes-issues#2241

qubes/tests/__init__.py

@@ -45,6 +45,7 @@ import sys
 import tempfile
 import traceback
 import unittest
+import __builtin__
 
 import lxml.etree
 import time
@@ -653,7 +654,8 @@ class SystemTestsMixin(object):
         wait_count = 0
         while subprocess.call(['xdotool', 'search', '--name', title],
                               stdout=open(os.path.devnull, 'w'),
-                              stderr=subprocess.STDOUT) == int(show):
+                              stderr=subprocess.STDOUT) == \
+                __builtin__.int(show):
             wait_count += 1
             if wait_count > timeout*10:
                 self.fail("Timeout while waiting for {} window to {}".format(