lib/api-syncRecords.js
function listPendingChangesForClient(datasetId, clientInfo, cb) {
  pendingQueue.search({datasetId: datasetId, cuid: clientInfo.cuid}, cb);
}
function listPendingChangesForClient(datasetId, clientInfo, cb) {
  pendingQueue.search({datasetId: datasetId, cuid: clientInfo.cuid}, cb);
}
List the pending changes for the given client that are still waiting to be processed
@param {String} datasetId
@param {Object} clientInfo the client info. Should contain the cuid
@param {Function} cb