outlier_detector: accept large base_ejection_time when max_ejection_time not specified (#14962)

Changed logic in config verification when max_ejection_time is not specified
and base_ejection_time is larger than max_ejection_time's default.

Signed-off-by: Christoph Pakulski <christoph@tetrate.io>

Mirrored from https://github.com/envoyproxy/envoy @ 12df7d09222af273828ed114e5254caeba65d658

envoy/config/cluster/v3/outlier_detection.proto

@@ -151,7 +151,7 @@ message OutlierDetection {
   google.protobuf.UInt32Value failure_percentage_request_volume = 20;
 
   // The maximum time that a host is ejected for. See :ref:`base_ejection_time<envoy_api_field_config.cluster.v3.OutlierDetection.base_ejection_time>`
-  // for more information.
-  // Defaults to 300000ms or 300s.
+  // for more information. If not specified, the default value (300000ms or 300s) or
+  // :ref:`base_ejection_time<envoy_api_field_config.cluster.v3.OutlierDetection.base_ejection_time>` value is applied, whatever is larger.
   google.protobuf.Duration max_ejection_time = 21 [(validate.rules).duration = {gt {}}];
 }

envoy/config/cluster/v4alpha/outlier_detection.proto

@@ -151,7 +151,7 @@ message OutlierDetection {
   google.protobuf.UInt32Value failure_percentage_request_volume = 20;
 
   // The maximum time that a host is ejected for. See :ref:`base_ejection_time<envoy_api_field_config.cluster.v4alpha.OutlierDetection.base_ejection_time>`
-  // for more information.
-  // Defaults to 300000ms or 300s.
+  // for more information. If not specified, the default value (300000ms or 300s) or
+  // :ref:`base_ejection_time<envoy_api_field_config.cluster.v4alpha.OutlierDetection.base_ejection_time>` value is applied, whatever is larger.
   google.protobuf.Duration max_ejection_time = 21 [(validate.rules).duration = {gt {}}];
 }