Method/variable renaming + Fix for change_table

Method "copy_temporal_indexes_to_history_after_change_table_to_temporal":
- Rename the method to "copy_indexes_to_history_from_temporal".
- Rename the local variable from "temporal_index" to "index"
- Add specifications
Method "change_table":
- Call the method "copy_indexes_to_history_from_temporal" to copy the indexes in history for the tables using indexes before the temporalizing.