bindings/java: Enable retry layer by default in behavior test

[suyanhanx]

Since this issue has not been resolved, the Dropbox service in java binding has been failing to test tentatively.

[Xuanwo]

Related to https://github.com/apache/incubator-opendal/pull/3392

[Xuanwo]

By the way, maybe we should also take a review on dropbox code to avoid such ratelimit. For example, check dir first before calling create_dir.

RateLimited (temporary) at create_dir => DropboxErrorResponse { error_summary: "too_many_write_operations/" }

Context:
   uri: https://api.dropboxapi.com/2/files/create_folder_v2
   response: Parts { status: 429, version: HTTP/2.0, headers: {"cache-control": "no-cache", "content-security-policy": "sandbox allow-forms allow-scripts", "retry-after": "1", "x-content-type-options": "nosniff", "content-type": "application/json", "accept-encoding": "identity,gzip", "date": "Thu, 02 Nov 2023 04:37:05 GMT", "server": "envoy", "content-length": "107", "x-dropbox-response-origin": "far_remote", "x-dropbox-request-id": "ba43ab1d9e994630942eb59d2c91ae4c"} }
   service: dropbox
   path: a7aa844b-7688-4a1a-8fc8-a03110d09eeb/

[Xuanwo]

https://github.com/apache/incubator-opendal/pull/3392 has been merged, let's add retry layer.

[tisonkun]

It's already enabled with:

            this.operator = op.layer(RetryLayer.builder().build());

in the patch.