selftests: Increase the test_job_timeout selftest timeout

The current 2s sleep is too-time-sensitive for travis from time to
time. Let's increase the test's sleep to 10s.
Signed-off-by: NLukáš Doktor <ldoktor@redhat.com>

selftests/functional/test_job_timeout.py

@@ -26,7 +26,7 @@ from avocado import Test
 
 class Dummy(Test):
     def test00sleep(self):
-        time.sleep(2)
+        time.sleep(10)
     def test01pass(self):
         pass
     def test02pass(self):