Creates a new Connection as using the driver, url, userid and password
specified.
The calling method is responsible for closing the connection.
Connection the newly created connection. throws: BuildException - if the UserId/Password/Url is not set or thereis no suitable driver or the driver fails to load.
Caching loaders / driver. This is to avoid
getting an OutOfMemoryError when calling this task
multiple times in a row; default: true
Parameters: enable - a boolean value