[Bug] Resource leak: 'traverser' is never closed

[javeme]

Bug Type (问题类型)

No response

Before submit

• 我已经确认现有的 Issues 与 FAQ 中没有相同 / 重复问题

Environment (环境信息)

• Server Version: v0.11.x
• Backend: RocksDB x nodes, HDD or SSD
• OS: xx CPUs, xx G RAM, Centos 7.x
• Data Size: xx vertices, xx edges

Expected & Actual behavior (期望与实际表现)

How to fix: close resource with try(PredictionTraverser traverser = new PredictionTraverser(g)):

• https://github.com/hugegraph/hugegraph/blob/0ca54c409711d9f376c7b3b452b98a2630d86bd4/hugegraph-api/src/main/java/com/baidu/hugegraph/api/traversers/ResourceAllocationAPI.java#L81
• https://github.com/hugegraph/hugegraph/blob/0ca54c409711d9f376c7b3b452b98a2630d86bd4/hugegraph-api/src/main/java/com/baidu/hugegraph/api/traversers/AdamicAdarAPI.java#L81

Vertex/Edge example (问题点 / 边数据举例)

No response

Schema [VertexLabel, EdgeLabel, IndexLabel] (元数据结构)

No response