Code cleanup

We decided that H2 will no longer be used, as it was replaced by HSQLDB because of a licensing issue(sql?).   Downstream projects can pull it from Oxygen if needed.  Remove the persistence H2 from master.

We identified other unsed code, like the controller metrics monitor.  We need to identify this code, evaluate and remove if not needed.

Let's use this task for all code cleanup, but use seperate patches for each removal, noted here.