Reading Parquet tables from Metastore mangles location

Currently we do "relation.hiveQlTable.getDataLocation.getPath", which returns the path-part of the URI (e.g., s3n://my-bucket/my-path => /my-path). We should do "relation.hiveQlTable.getDataLocation.toString" instead, as a URI's toString returns a faithful representation of the full URI, which can later be passed into a Hadoop Path.