[Integration] Add integration tests for Binary / Varbytes type

[asfimport]

String / UTF8 varbytes is being tested, but not the (equivalent, metadata aside) Binary type

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

Related issues:

• Arrow release 0.2 (blocks)

_{Note: This issue was originally created as ARROW-476. Please see the migration documentation for further details.}

[asfimport]

Wes McKinney / @wesm:
PR: #326

[asfimport]

Wes McKinney / @wesm:
Issue resolved by pull request 326
#326