Add normalize path to USER env. var in path_expansion test case.
Without this change, there were two test failures on Fedora Linux 28.
@@ -25,4 +25,5 @@ Get OS Independent Home Path
${homepath}= Get Environment Variable HOMEPATH NotSet
${homedrive}= Get Environment Variable HOMEDRIVE NotSet
${home}= Get Environment Variable HOME ${homedrive}${homepath}
+ ${home}= Normalize Path ${home}
[Return] ${home}
