CameraITS: fix scene5 manual running flow

Test: run_all_test.py without ITS box
Bug: 65594230
Change-Id: Ia706a1e17d7fd1842381e33bbe79ea3a5da425e4
diff --git a/apps/CameraITS/tools/run_parallel_tests.py b/apps/CameraITS/tools/run_parallel_tests.py
index a8a77d4..902eaba 100644
--- a/apps/CameraITS/tools/run_parallel_tests.py
+++ b/apps/CameraITS/tools/run_parallel_tests.py
@@ -99,6 +99,8 @@
     # scene 5 is not automated and no chart is needed
     if scene_id != '5':
         cmd.append('chart=%s' % chart_host_id)
+    else:
+        cmd.append('skip_scene_validation')
 
     return cmd