Avoid secondary deployment of package to local

[zachgk]

Description

Avoid creating an org.apache.mxnet.mxnet-deployment artifact when doing a local deployment from Scala

@lanking520 @andrewfayres

Checklist

Essentials

Please feel free to remove inapplicable items for your PR.

• The PR title starts with [MXNET-$JIRA_ID], where $JIRA_ID refers to the relevant JIRA issue created (except PRs with tiny changes)
• Changes are complete (i.e. I finished coding on this PR)
• All changes have test coverage:
• Unit tests are added for small changes to verify correctness (e.g. adding a new operator)
• Nightly tests are added for complicated/long-running ones (e.g. changing distributed kvstore)
• Build tests will be added for build configuration changes (e.g. adding a new build option with NCCL)
• To the my best knowledge, examples are either not affected by this change, or have been fixed to be compatible with this change

[zachgk]

@mxnet-label-bot add [Scala, Maven]