HPCC-9061 Invalid "context" qualifier

Fixes HPCC-9061

Signed-off-by: Gordon Smith <gordon.smith@lexisnexis.com>

esp/files/scripts/ESPWorkunit.js

@@ -131,7 +131,7 @@ define([
         _VariablesSetter: function (Variables) {
             var variables = [];
             for (var i = 0; i < Variables.ECLResult.length; ++i) {
-                context.variables.push(lang.mixin({
+                variables.push(lang.mixin({
                     ColumnType: Variables.ECLResult[i].ECLSchemas && Variables.ECLResult[i].ECLSchemas.ECLSchemaItem.length ? Variables.ECLResult[i].ECLSchemas.ECLSchemaItem[0].ColumnType : "unknown"
                 }, variables[i]));
             }