[Java] Add container type for Map logical type

[asfimport]

As follow up to ARROW-1246

Reporter: Wes McKinney / @wesm
Assignee: Bryan Cutler / @BryanCutler

Related issues:

• [Integration][Java] Integration tests for Map type (is depended upon by)

PRs and other links:

• GitHub Pull Request #4444

_{Note: This issue was originally created as ARROW-1261. Please see the migration documentation for further details.}

[asfimport]

Bryan Cutler / @BryanCutler:
I am planning to start working on this soon unless you still wanted to @siddharthteotia?

[asfimport]

Bryan Cutler / @BryanCutler:
I'll reassign to myself for now, I'll probably be able to start work in a couple days

[asfimport]

Micah Kornfield / @emkornfield:
Issue resolved by pull request 4444
#4444