uitests: Give more time for graceful app shutdown

Signed-off-by: Cole Robinson <crobinso@redhat.com>

tests/uitests/utils.py

@@ -562,16 +562,18 @@ class VMMDogtailApp(object):
             self._proc = None
             return
 
-        # Wait for shutdown for 1 second, with 20 checks
-        for ignore in range(20):
+        def _wait_for_exit():
+            # Wait for shutdown for 2 sec
+            waittime = 2
+            for ignore in range(int(waittime / .05)):
                 time.sleep(.05)
                 if self._proc.poll() is not None:
                     self._proc = None
+                    return True
+
+        if _wait_for_exit():
             return
 
         log.warning("App didn't exit gracefully from SIGINT. Killing...")
-        try:
         self._proc.kill()
-        finally:
-            time.sleep(1)
-        self._proc = None
+        _wait_for_exit()