Added Johanson 0896BM15A0001 balun (generated by script)

[cnieves1]

Datasheet: https://www.johansontechnology.com/datasheets/0896BM15A0001/0896BM15A0001.pdf Source: https://github.com/easyw/kicad-3d-models-in-freecad/pull/356

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Thanks for creating a pull request to contribute to the KiCad libraries! To speed up integration of your PR, please check the following items as you complete them:

• [X] A screenshot of the model(s) aligned with KiCad footprints is very useful
• [X] Was the 3D model(s) created in a mechanical modelling program?
• [X] Source files (or scripts) have been contributed
• [X] Step model submitted in 1:1 scale
• [X] WRL model submitted in 1:2.54 scale
• [X] 3D model alignment checked against KiCad footprint
• [X] WRL model uses correct material properties
• [ ] Geometry check performed against mechanical models

[chschlue]

Thanks.