[Java][Integration] enable duplicate field names integration tests

[asfimport]

Reporter: Ryan Murray / @rymurr
Assignee: Ryan Murray / @rymurr

PRs and other links:

• GitHub Pull Request #7289

_{Note: This issue was originally created as ARROW-8948. Please see the migration documentation for further details.}

[asfimport]

Neal Richardson / @nealrichardson:
Issue resolved by pull request 7289
#7289