fix(imaginary): always log on info level

[szaimen]

Imaginary now always logs on info level so that it is visible what it does. Debug output is still additionally enabled if AIO_LOG_LEVEL is set to debug.

Summary

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[pabzm]

With this change there's no way anymore for users to make imaginary be quieter, right?

Is that on purpose?

I'd prefer to keep AIO_LOG_LEVEL determining all application's log levels, and not to introduce exceptions, because they increase complexity.

At least unless there's a grave reason for the change. Just for seeing what the apps do, users could set well set AIO_LOG_LEVEL to info, or not?

[pabzm]

We discussed verbally that we want to introduce this exception because imaginary does not log anything (if there's no problem) with a log level above 'info', which we consider easily irritating for users.

[pabzm]

I think the log should contain a note if the log level is 'warn' or 'error', that it gets ignored (like in the watchtower PR).

[szaimen]

I think the log should contain a note if the log level is 'warn' or 'error', that it gets ignored (like in the watchtower PR).

Done