MT#62181 don't shut thread with pending events

Make sure all events are consumed and processed before shutting down.

Change-Id: I3a83cad0310d39ef766420123f628246c9f4275a

apps/db_reg_agent/DBRegAgent.cpp

@@ -1235,7 +1235,7 @@ void DBRegAgent::run() {
   }
 
   DBG("running DBRegAgent thread...\n");
-  while (!stop_requested()) {
+  while (!stop_requested() || eventPending()) {
     waitForEventTimed(500); // 500 milliseconds
     processEvents();
   }
@@ -1773,7 +1773,7 @@ void DBRegAgentProcessorThread::run() {
     allowance = DBRegAgent::ratelimit_rate;
 
   reg_agent = DBRegAgent::instance();
-  while (!stop_requested()) {
+  while (!stop_requested() || eventPending()) {
     waitForEventTimed(500);
     while (eventPending()) {
       rateLimitWait();