OPEN - issue BATCH-789: Remove mark/reset from ItemReader

Still some open issues with retry and skip, but nearly there...

spring-batch-infrastructure/src/main/java/org/springframework/batch/retry/policy/RecoveryCallbackRetryPolicy.java

@@ -203,7 +203,6 @@ public class RecoveryCallbackRetryPolicy extends AbstractStatefulRetryPolicy {
 		public Object handleRetryExhausted(RetryContext context) throws ExhaustedRetryException {
 			// If there is no going back, then we can remove the history
 			retryContextCache.remove(key);
-			RepeatSynchronizationManager.setCompleteOnly();
 			if (recoverer != null) {
 				return recoverer.recover(context);
 			}