YARN-8706. Allow additional flag in docker inspect call.

            Contributed by Chandni Singh

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/native/container-executor/impl/utils/docker-util.c

@@ -558,7 +558,8 @@ cleanup:
 
 int get_docker_inspect_command(const char *command_file, const struct configuration *conf, args *args) {
   const char *valid_format_strings[] = { "{{.State.Status}}",
-                                "{{range(.NetworkSettings.Networks)}}{{.IPAddress}},{{end}}{{.Config.Hostname}}" };
+                                "{{range(.NetworkSettings.Networks)}}{{.IPAddress}},{{end}}{{.Config.Hostname}}",
+                                 "{{.State.Status}},{{.Config.StopSignal}}"};
   int ret = 0, i = 0, valid_format = 0;
   char *format = NULL, *container_name = NULL, *tmp_buffer = NULL;
   struct configuration command_config = {0, NULL};
@@ -578,7 +579,7 @@ int get_docker_inspect_command(const char *command_file, const struct configurat
     ret = INVALID_DOCKER_INSPECT_FORMAT;
     goto free_and_exit;
   }
-  for (i = 0; i < 2; ++i) {
+  for (i = 0; i < 3; ++i) {
     if (strcmp(format, valid_format_strings[i]) == 0) {
       valid_format = 1;
       break;