tests.testdata can't be a Python modul

[Andreas Rabe]

• don’t create the __init__.py , which makes the folder a modul

  * create a modul under the src folder

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[Benjamin Jakimow]

Just for the docs and because I forgot it: What again was the reason for not having this autogenerated init.py in testdata?

Having imports "from testdata import enmap_tif" would be straight forward.

[Andreas Rabe]

Source code should be located in the source code folder src.

If you want to make testdata a modul, than it should be moved under src.

Also, testdata is not a good name for a top-level modul (to general, naming conflics are likely). Better name would be enmapboxtestdata.