Add SMW\Tests\Integration\SemanticDataStorageDBIntegrationTest

In response to [0] and further

Adds:
- DataTypeRegistry::isKnownTypeId
- DIProperty::setPropertyTypeId

Removes:
- DataValueFactory::newPropertyValue to be static

To cover testAddUserDefinedBlobPropertyAsObjectToSemanticDataForStorage

[0] http://wikimedia.7.x6.nabble.com/Store-SemanticData-object-and-retrieve-it-from-the-database-tp5030119.html
Merge pull request #334 from SemanticMediaWiki/storage-db-test

Add SMW\Tests\Integration\SemanticDataStorageDBIntegrationTest