Made some OIM DB close() error messages into info.  Changed the isConnectionValid() to use isValid() - experimental.
Made some OIM DB close() error messages into info. 
Changed the isConnectionValid() to use isValid() - experimental.

opensciencegrid/oim,opensciencegrid/oim,opensciencegrid/oim,opensciencegrid/oim,opensciencegrid/oim