tests/sleeptenmin.py: implement a test specific progress check

Which doesn't hold any logic, but serves as an example.

To watch the intended behavior in action, I recommend running the
"one_hundred_cycles" variant of this tests.

The test runner will show that the test is running (yellow throbber
spinning), and once each six seconds (+1% into the test run) a green
throbber will be shown.
Signed-off-by: NCleber Rosa <crosa@redhat.com>

tests/sleeptenmin.py

@@ -31,6 +31,12 @@ class sleeptenmin(test.Test):
                       'sleep_cycles': 1,
                       'sleep_method': 'builtin'}
 
+    def check_progress(self):
+        """
+        We do nothing besides sleeping, so anything can be considered progress
+        """
+        return True
+
     def action(self):
         """
         Sleep for length seconds.
@@ -44,6 +50,7 @@ class sleeptenmin(test.Test):
                 time.sleep(length)
             elif self.params.sleep_method == 'shell':
                 os.system("sleep %s" % length)
+            self.communicate_state()
 
 if __name__ == "__main__":
     job.main()