add sleep between image prepull batches

Author: ihiverlet

utils/prepull_images.py

@@ -297,6 +297,7 @@ def prepull_images(namespace: str,
         try:
             logging.info('FIRST BATCH : CPU IMAGES')
             prepull_images(namespace=NAMESPACE, image_type="cpu")
+            time.sleep(3660) # To avoid exceeding the Docker pull limit 
             logging.info('SECOND BATCH : GPU IMAGES')
             prepull_images(namespace=NAMESPACE, image_type="gpu")
             logging.info('PRE-PULL PROCESS DONE')