[Python] Empty "private" directories should be ignored by Parquet interface

[asfimport]

See description of issue in ARROW-1064

Reporter: Wes McKinney / @wesm
Assignee: Wes McKinney / @wesm

Related issues:

• Arrow 0.5.0 release (blocks)

_{Note: This issue was originally created as ARROW-1079. Please see the migration documentation for further details.}

[asfimport]

Wes McKinney / @wesm:
PR: #860

[asfimport]

Wes McKinney / @wesm:
Issue resolved by pull request 860
#860