Expose durationMicros when dumping hearbeatSucceeded events

Author: alcaeus

src/MongoDB/Monitoring/ServerHeartbeatSucceededEvent.c

@@ -124,6 +124,7 @@ static HashTable* php_phongo_serverheartbeatsucceededevent_get_debug_info(phongo
 	ADD_ASSOC_STRING(&retval, "host", intern->host.host);
 	ADD_ASSOC_LONG_EX(&retval, "port", intern->host.port);
 	ADD_ASSOC_BOOL_EX(&retval, "awaited", intern->awaited);
+	ADD_ASSOC_INT64(&retval, "durationMicros", intern->duration_micros);
 
 	if (!php_phongo_bson_to_zval_ex(intern->reply, &reply_state)) {
 		zval_ptr_dtor(&reply_state.zchild);

tests/apm/serverHeartbeatSucceededEvent-001.phpt

@@ -68,6 +68,8 @@ object(MongoDB\Driver\Monitoring\ServerHeartbeatSucceededEvent)#%d (%d) {
   int(%d)
   ["awaited"]=>
   bool(%s)
+  ["durationMicros"]=>
+  int(%d)
   ["reply"]=>
   object(stdClass)#%d (%d) {%A
   }