PHPUnit 4.2 compat

- Removed `::staticExpects` (see [0])
- Removed static caller where necessary (only used within `SMWSQLStore3`), `public static function findTypeTableId`, `public static function findDiTypeTableId`
- `SMW\Store::setupStore` remains static, dropped mock instead

[0] https://github.com/sebastianbergmann/phpunit/wiki/Release-Announcement-for-PHPUnit-4.0.0#backwards-compatibility-issues