Implement the JC-87 process to SETIS, and modify all necessary classes and functions:
Implement factory
Conversation class for SmtpConnection entity to OutgoingConnectionBean
Move all email modifications before store in OutgoingEmailItem
Modify OutgoingMailQueueTask
Modify EmailBuilder class
Unittest
Test the following cases:
manual email, notification, bulk, workflow
verify that images adn attachments are correctly added
verify that email headers / customer headers are correctly added to the outgoing emails
verify OAuth
verify Debug and fallback to Jira behavour