
The Magento\Bundle\Model\Product\Attribute\Source\Price\Type class is really absent both in the latest development and production (2.0.4) versions:
The failed attempt to instantiate the class is occured here:


The setup class does not set the source_model (source) property:
So I suggest that the Magento\Bundle\Model\Product\Attribute\Source\Price\Type values is a legacy from an old Magento 2 version.
How to fix:
UPDATE eav_attribute SET source_model = '' WHERE attribute_code in ('price_type', 'sku_type', 'weight_type');