Add getJson function for JSON table retrieval

Implement getJson function to retrieve table fields as JSON.

Author: raghavs046

Specialized Areas/Fix scripts/Create Table JSON/script.js

@@ -0,0 +1,12 @@
+getJson('incident', 'rfc,caller_id'); // pass table name and field names comma separated.
+function getJson(tableName, fields) {
+    var jsonObj = {};
+    var eQry = gs.nil(fields) ? 'name=' + tableName : 'name=' + tableName + '^elementIN' + fields; // generate JSON of enitre table if no fields are specified.
+    var dict = new GlideRecord('sys_dictionary');
+    dict.addEncodedQuery(eQry);
+    dict.query();
+    while (dict.next()) {
+        jsonObj[dict.element] = '';
+    }
+    gs.print(JSON.stringify(jsonObj));
+}