PTFM-18459 Added 'AssetBundle' property to hidden tarball.
PTFM-18459 Added 'AssetBundle' property to hidden tarball.

Summary:
Added "AssetBundle" property to hidden tarball.
  "AssetBundle":  record-xxx

Test Plan:
Deployed on staging.

dx-toolkit$ src/python/test/test_dxasset.py TestDXBuildAsset.test_set_assetbundle_tarball_property

Reviewers: psung

Reviewed By: psung

Differential Revision: https://dnanexus.phacility.com/D1094

dnanexus/dx_app_builder,dnanexus/dx_app_builder