Changed submodules to use https url.

.gitmodules

 [submodule "LabChartExport"]
 	path = LabChartExport
-	url = git@git.rwth-aachen.de:ModeliChart/LabChartExportCLI.git
+	url = https://git.rwth-aachen.de/ModeliChart/LabChartExportCLI.git
 [submodule "FmiWrapper"]
 	path = FmiWrapper
-	url = git@github.com:Tuebel/FmiWrapper.git
+	url = https://github.com/Tuebel/FmiWrapper.git