Minor clean up of CConnection and DB class:
Remove comment out code
Deprecate DB.createConnection method that ignore the readOnly parameter
Do not hide exception from DB_Oracle/DB_PostgreSQL getCachedConnection call
Minor clean up of CConnection and DB class:
Remove comment out code
Deprecate DB.createConnection method that ignore the readOnly parameter
Do not hide exception from DB_Oracle/DB_PostgreSQL getCachedConnection call