remove temporary tokens from expression hash after substitution. Keep…

…ing token will make expression evaluation failed.

Fixes https://bugzilla.redhat.com/show_bug.cgi?id=1558926

lib/miq_expression/subst_mixin.rb

@@ -71,6 +71,7 @@ def exp_replace_qs_tokens(exp, tokens)
         end
         exp[key]["value"] = value # Replace the exp value with the proper qs value
       end
+      exp.delete(:token)
     end
   end