Add VSA testdata 2015.xtf and organisations

[ponceta]

Describe the bug For next userday, bring vsa 2015.xtf to work as QGEP import to be then exported to TEKSI wastewater

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Expected behavior A clear and concise description of what you expected to happen.

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Desktop (please complete the following information):

• QGEP plugin version
• QGEP datamodel version
• QGEP project file version
• QGIS Version
• OS

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