Fixed onAuditLog not working (#772)

* Fix onAuditLog fetching oldest audit logs

Added sortOrder argument to return the newest audit logs rather than only fetching the oldest ones, resulting in nothing coming through when using onAuditLog.

* Changed double quotes to single

lib/groups/onAuditLog.js

@@ -30,7 +30,7 @@ exports.func = function (args) {
   let empty = false
   return shortPoll({
     getLatest: function (latest) {
-      return getAuditLog({ group: args.group, jar: args.jar })
+      return getAuditLog({ group: args.group, jar: args.jar, sortOrder: 'Desc' })
         .then(function (audit) {
           const given = []
           if (audit) {