Performance optimizations.  Remove unnecessary int -> long implicit conversions.  These are hidden costs easily missed.
Merge branch 'dev' of github.com:brettwooldridge/HikariCP into dev

* 'dev' of github.com:brettwooldridge/HikariCP:
  Add IBM DB2 DataSource class to table.
  Minor cleanup.
  Minor cleanup.
  More metrics groundwork.
  Revert "Speculative fix for cross-thread visibility issue."