Auto update references to variable when variable name is changed
Right now, when you rename a variable from name "x" to "y", the (keyword)tests in which these variables are used are not updated. When run they fail with an exception. In my opinion the link should be maintained (ie. when the name is updated the code in which the variable name is used should be updated as well). Similar like now already implemented in name mapping (renaming aliases results in updating the keyword scripts, very handy!).
