* Fix mail lock race condition & Sonar smells
https://build.spring.io/browse/INT-MASTERSPRING40-599/
* The `folderReadLock` might not be re-locked when `openFolder()`
throws an exception
* Fix all the Sonar smells for mail module
* Optimize all the dynamic `Assert` messages to `Supplier`
* Refactor `MailReceiverFactoryBean` to be based on the `AbstractFactoryBean`
* * Fix new reported Sonar smells
* * Log error during cancel idle state in the `ImapMailReceiver`
* Remove commented code in the `MailTransportUtils`
5295a76b42