Fix issue where bootstrap.rb overwrites the level of a BroadcastLogger's broadcasts

[andrewn617]

Motivation / Background

This Pull Request has been created because in bootstrap.rb we set the Rails.logger.level to config.log_level. But at this point, we may have already set up a BroadcastLogger with multiple broadcasts that have different levels. So, calling level= on the BroadcastLogger will overwrite the level of the individual broadcasts. So instead, let's only set the Rails.logger.level if the logger is not a BroadcastLogger.

Detail

We already have an unless Rails.logger.is_a?(ActiveSupport::BroadcastLogger) block on the next line of the code, so I just move the call to Rails.logger.level = within there.

Additional information

Checklist

Before submitting the PR make sure the following are checked:

• This Pull Request is related to one change. Changes that are unrelated should be opened in separate PRs.
• Commit message has a detailed description of what changed and why. If this PR fixes a related issue include it in the commit message. Ex: [Fix #issue-number]
• Tests are added or updated if you fix a bug or add a feature.
• CHANGELOG files are updated for the changed libraries if there is a behavior change or additional feature. Minor bug fixes and documentation changes should not be included.