dpsim-villas: fix hardcoded paths (#327) #2510

Job	Run time
Scan Sourcecode with Cppcheck	3m 24s
Build dpsimpy and tests examples on Fedora Linux	6m 59s
Build Cxx examples on Fedora Linux	10m 53s
Run pytest over all notebooks	13m 19s
Execute WSCC 9 bus example	58s
Run dpsim-mqtt VILLASnode example / Run a VILLASnode example across multiple containers	1m 35s
Run dpsim-mqtt-import-export VILLASnode example / Run a VILLASnode example across multiple containers	1m 23s
Run dpsim-mqtt-import-export-MIMO VILLASnode example / Run a VILLASnode example across multiple containers	1m 13s
Run mqtt-cigre-mv-pf-profiles VILLASnode example / Run a VILLASnode example across multiple containers	1m 43s
Run dpsim-file VILLASnode example / Run a VILLASnode example across multiple containers	2m 27s
Compare Notebook results	10s
	44m 4s

Provide feedback