PutDatabaseRecord ignores schema name when getting primary keys

When retrieving the primary keys from the database metadata for UPDATE/UPSERT operations, the schema name/pattern is not passed to the getPrimaryKeys() method.

This can be illustrated with two schemas having a table of the same name but different primary key columns. The method will return both primary key columns where only the column for the specified schema should be returned.

NOTE: The database driver itself may choose to ignore the schema name and return all matching columns, but all NiFi can do is pass in the schema name and the rest is up to the driver.