add support for running in AWS autoscale cluster with graceful scale-in and standby

lib/utils/install-srf-locals.js

@@ -25,7 +25,7 @@ function initMS(logger, wrapper, ms) {
 function installSrfLocals(srf, logger) {
   logger.debug('installing srf locals');
   assert(!srf.locals.dbHelpers);
-  const {getSBC} = require('./sbc-pinger')(logger);
+  const {getSBC, lifecycleEmitter} = require('./sbc-pinger')(logger);
   const StatsCollector = require('jambonz-stats-collector');
   const stats = srf.locals.stats = new StatsCollector(logger);
 
@@ -135,6 +135,7 @@ function installSrfLocals(srf, logger) {
     ipv4: localIp,
     serviceUrl: `http://${localIp}:${PORT}`,
     getSBC,
+    lifecycleEmitter,
     getFreeswitch,
     stats: stats
   });