Revert  [SPARK-3011][SQL] _temporary directory should be filtered out by sqlContext.parquetFile

Reverts #1924 due to build failures with hadoop 0.23.

Author: Michael Armbrust <michael@databricks.com>

Closes #1949 from marmbrus/revert1924 and squashes the following commits:

6bff940 [Michael Armbrust] Revert "[SPARK-3011][SQL] _temporary directory should be filtered out by sqlContext.parquetFile"

(cherry picked from commit a7f8a4f5ee757450ce8d4028021441435081cf53)
Signed-off-by: Michael Armbrust <michael@databricks.com>