[Python] Verify Parquet roundtrips for new date/time types

[asfimport]

Support Time with MILLI and MICRO TimeUnit in arrow conversion.
See also ARROW-601

Reporter: Miki Tebeka / @tebeka
Assignee: Wes McKinney / @wesm

Related issues:

• [C++] Account for all Arrow date/time types (blocks)

_{Note: This issue was originally created as PARQUET-915. Please see the migration documentation for further details.}

[asfimport]

Wes McKinney / @wesm:
PR: #595

[asfimport]

Wes McKinney / @wesm:
Issue resolved by pull request 595
#595