修复ognl表达式获取字段值返回类型错误

[Allan-QLB]

由于ObjectPropertyAccessor会优先尝试调用字段的get方法或read方法（例如名称为hasXXX的方法），有时候这些方法并不会直接返回字段值，导致无法查看对象的某些字段，例如org.apache.kafka.clients.consumer.internals.Fetcher,查看字段completedFetches返回的是一个boolean类型

public class Fetcher<K, V> implements Closeable {
   
    private final int maxPollRecords;
    private final boolean checkCrcs;
    private final String clientRackId;
    private final ConsumerMetadata metadata;
    private final FetchManagerMetrics sensors;
    private final SubscriptionState subscriptions;
    private final ConcurrentLinkedQueue<CompletedFetch> completedFetches;
   
    private final ApiVersions apiVersions;

    private PartitionRecords nextInLineRecords = null;

  
    public boolean hasCompletedFetches() {
        return !completedFetches.isEmpty();
    }
}