SNOW-933005 Fix Wrong Error Code Issues in testProdConnectivity and testInsecureMode

[sfc-gh-bli]

Overview

SNOW-933005 Fix Wrong Error Code Issues in testProdConnectivity and testInsecureMode

The error code of wrong account name was changed from 390100 (incorrect username and password) to 390400 (bad request). This PR fixes all related tests.

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1. What GitHub issue is this PR addressing? Make sure that there is an accompanying issue to your PR.

   Fixes #NNNN

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   • I am adding a new automated test(s) to verify correctness of my new code
   • I am adding new logging messages
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   • I am adding new credentials
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   • I am adding a new dependency

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[sfc-gh-igarish]

LGTM