[fix][test] Fix test testThreadSwitchOfZkMetadataStore

[poorbarcode]

Motivation

After the PR #20303 was cherry-picked inti branch-2.11, the test testThreadSwitchOfZkMetadataStore was failed.

The root cause: the attribute metadataStoreName is a new attribute provided by the PR #17041, at it released at 3.0.0, so it is not included in branch-2.11, so the name of thread-pool of Metadata store is a fixed value metadata-store

protected AbstractMetadataStore() {
    this.executor = Executors
            .newSingleThreadScheduledExecutor(new DefaultThreadFactory("metadata-store"));
    registerListener(this);
    ...
}

Modifications

Instead of a special value, verify the name of the thread pool by the fixed value metadata-store

Documentation

• doc
• doc-required
• doc-not-needed
• doc-complete

Matching PR in forked repository

PR in forked repository: x