Fix flaky test `ParseLiveQuery handle invalid websocket payload length`

[mtrezza]

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Issue Description

Fix flaky test ParseLiveQuery handle invalid websocket payload length.

https://github.com/parse-community/parse-server/blob/453a9879efedc98d942e0c0d3c9254ae5cd4858b/spec/ParseLiveQuery.spec.js#L881

The test is currently in the flaky test list:

https://github.com/parse-community/parse-server/blob/9fd707092eeb431b7165b79b329bbd4b58be6942/spec/support/CurrentSpecReporter.js#L13-L14

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