Merge pull request #366 from ie3-institute/jh/#365-err-to-warn

Log a warning instead of an error

Author: ckittl

src/main/java/edu/ie3/datamodel/io/factory/input/participant/LoadInputFactory.java

@@ -52,7 +52,7 @@ protected LoadInput buildModel(
     try {
       slp = StandardLoadProfile.parse(data.getField(SLP));
     } catch (ParsingException e) {
-      logger.error(
+      logger.warn(
           "Cannot parse the standard load profile \"{}\" of load \"{}\". Assign no load profile instead.",
           data.getField(SLP),
           id);