added port handling for mysql_connection_class

This version introduces multiple enhancements:

added port handling for database connection
added port number to database connection example

Details of additions/deletions below:
--------------------------------------------------------------

Modified:   /BLUE_FRAMEWORK/packages/db/mysql_connection_class.php
            -- Updated --
                __construct added port number handling

Modified:   /BLUE_FRAMEWORK/modules/mod2/mod2.php
            -- Updated --
                connectionTest, added port number to mysql_connection_class