Change the date format.Remove the replication part of log4j.
Use a new date format.
Add code to get and set the last process date.
move IndexEvent into metacat-common. Perparation for Metacat responding to events and writing them to a persistent store. https://projects.ecoinformatics.org/ecoinfo/issues/5944
refactor IndexEventLog a bit to simplify type/action information. prep for serializing IndexEvent objects to Metacat. https://projects.ecoinformatics.org/ecoinfo/issues/5944