Stop time normalization refactor

[br648]

Checklist

• [x] Appropriate branch selected (all PRs must first be merged to dev before they can be merged to master)
• [x] Any modified or new methods or classes have helpful JavaDoc and code is thoroughly commented
• [x] The description lists all applicable issues this PR seeks to resolve
• [x] The description lists any configuration setting(s) that differ from the default settings
• [x] All tests and CI builds passing

Description

Refactor of stop time normalization to reintroduce batch processing which was lost in the initial flex update. Move normalization to it's own dedicated class to reduce the complexity of JdbcTableWriter.

[binh-dam-ibigroup]

@br648 Remember to resolve conflicts.