Use PhysicalLogFile.DEFAULT_NAME instead of string everywhere in the codebase.
Remove the special .1 and .2 log files from the last class and fix the code to read the correct log file.
Create a constant for the log version suffix
Remove reference to old log files (active_tx_log and tm_tx_log) which are not present in 2.2
Rename log files

Make sure the migration process rename log files.