ENG-7313

- Eliminate spurious logging of bare canonical class name of
  the current class loader.
- Demote compiler info messages to DEBUG when the compiler is
  not standalone (thanks, jhugg!)
- Suppress the deployment file parameter logging on catalog
  update if the deployment file didn't change.
- Log the DDL statements in the current batch to be applied
  to the cluster
- Suppress the per-site catalog hash update messages