Add rptproj.rptuser

The VS 2017 version of the Business Intelligence project contains a user file (*.rptproj.rptuser) that should be ignored as well

VisualStudio.gitignore

@@ -247,6 +247,7 @@ UpgradeLog*.htm
 *.rdl.data
 *.bim.layout
 *.bim_*.settings
+*.rptproj.rsuser
 
 # Microsoft Fakes
 FakesAssemblies/