Reduce frames to speed up test

Change-Id: I6f92f91083ca8bfe058af21c95d84b8559e7d3ec
diff --git a/test/active_map_refresh_test.cc b/test/active_map_refresh_test.cc
index 5ec5987..161dc73 100644
--- a/test/active_map_refresh_test.cc
+++ b/test/active_map_refresh_test.cc
@@ -115,8 +115,8 @@
   cfg_.rc_end_usage = AOM_CBR;
   cfg_.kf_max_dist = 90000;
 
-  ::libaom_test::Y4mVideoSource video("desktop_credits.y4m", 0, 30);
-  ::libaom_test::Y4mVideoSource video_holder("desktop_credits.y4m", 0, 30);
+  ::libaom_test::Y4mVideoSource video("desktop_credits.y4m", 0, 10);
+  ::libaom_test::Y4mVideoSource video_holder("desktop_credits.y4m", 0, 10);
   video_holder.Begin();
   y4m_holder_ = &video_holder;