allow some time to stop

unit-tests/live/frames/test-pipeline-start-stop.py

@@ -7,6 +7,7 @@
 import pyrealsense2 as rs
 from rspy.stopwatch import Stopwatch
 from rspy import test, log
+import time
 
 # Run multiple start stop of all streams and verify we get a frame for each once
 
@@ -21,6 +22,7 @@ def verify_frame_received(config):
     delay = start_call_stopwatch.get_elapsed()
     log.out("After ", delay, " [sec] got first frame of ", f)
     pipe.stop()
+    time.sleep(1) # allow the streaming some time to acctualy stop between iterations
 
 
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