RFR: 1393: PR bot fails on missing .jcheck/conf [v12]

[Zhao Song]

On Wed, 16 Nov 2022 20:59:08 GMT, Erik Joelsson <erikj at openjdk.org> wrote:

> I think we want SEVERE log messages with the exception included for all the cases here.

I thought if the jcheck configuration file is not overridden, we just need to tell the user to contact the repo owner and only the repo owner could fix this problem, admin could not. 

For the case that  jcheck configuration file is  overridden, we need to notify the admin because admin could fix this problem.

But it is also reasonable to notify admin in the first case, maybe the admin could contact the repo owner too.

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PR: https://git.openjdk.org/skara/pull/1407