writeMetadataPdo surplus configuration

[rcnsheppardp]

There's a Too many arguments to function __construct(). 2 provided, but 1 accepted. warning being picked up in MetaLoader.php:675

The constructor on Metadata\MetaDataStorageHandlerPdo accepts one config parameter but then doesn't do anything with it anyway, calling Database::getInstance(); instead.

My inclination was to drop passing the config in the metarefresh module entirely but not sure if that's the right approach.

[tvdijen]

I've fixed the issue in master.
I can understand why you would want to drop passing the config, but that would change the public API.