don't report communication error on discovery abort #14992
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Description
When TE is "cancelling" discovery, it issues the abort command and that will close the communication channel. If the proxy is writing the request into it there will be an exception saying that we could not write to the channel. We already cancelled so we don't need to report this, since this is a race condition and user cannot do anything about the "error".
Related issue
https://devdiv.visualstudio.com/DevDiv/_queries/edit/2016626/?queryId=a6567881-6d43-4514-bab9-161652f32037