Taskmanager error logs in Kibana 7.0.0 beta1

[bhavyarm]

Kibana version: 7.0.0 Beta1 BC1

Elasticsearch version: 7.0.0 Beta1 BC1

Server OS version: darwin_x86_64

Browser OS version: os x

Original install method (e.g. download page, yum, from source, etc.): from staging

Describe the bug: Task manager is logging errors in Kibana log on a fresh install of Kibana

Steps to reproduce:

1. download default distro of elasticsearch and Kibana from staging
2. Start Kibana and elasticsearch
3. Task manager starts logging errors

Provide logs and/or server output (if relevant):

log   [16:40:38.105] [info][task_manager] Installing .kibana_task_manager index template version: 7000099.
  log   [16:40:38.107] [warning][task_manager] [illegal_argument_exception] The mapping definition cannot be nested under a type [_doc] unless include_type_name is set to true.
  log   [16:40:41.113] [info][task_manager] Installing .kibana_task_manager index template version: 7000099.
  log   [16:40:41.114] [warning][task_manager] [illegal_argument_exception] The mapping definition cannot be nested under a type [_doc] unless include_type_name is set to true.
  log   [16:40:44.121] [info][task_manager] Installing .kibana_task_manager index template version: 7000099.
  log   [16:40:44.123] [warning][task_manager] [illegal_argument_exception] The mapping definition cannot be nested under a type [_doc] unless include_type_name is set to true.
  log   [16:40:47.127] [info][task_manager] Installing .kibana_task_manager index template version: 7000099.
  log   [16:40:47.129] [warning][task_manager] [illegal_argument_exception] The mapping definition cannot be nested under a type [_doc] unless include_type_name is set to true.
  log   [16:40:50.134] [info][task_manager] Installing .kibana_task_manager index template version: 7000099.
  log   [16:40:50.136] [warning][task_manager] [illegal_argument_exception] The mapping definition cannot be nested under a type [_doc] unless include_type_name is set to true.
  log   [16:40:53.143] [info][task_manager] Installing .kibana_task_manager index template version: 7000099.
  log   [16:40:53.145] [warning][task_manager] [illegal_argument_exception] The mapping definition cannot be nested under a type [_doc] unless include_type_name is set to true.
  log   [16:40:56.152] [info][task_manager] Installing .kibana_task_manager index template version: 7000099.
  log   [16:40:56.154] [warning][task_manager] [illegal_argument_exception] The mapping definition cannot be nested under a type [_doc] unless include_type_name is set to true.
  log   [16:40:59.159] [info][task_manager] Installing .kibana_task_manager index template version: 7000099.
  log   [16:40:59.161] [warning][task_manager] [illegal_argument_exception] The mapping definition cannot be nested under a type [_doc] unless include_type_name is set to true.
  log   [16:41:02.170] [info][task_manager] Installing .kibana_task_manager index template version: 7000099.
  log   [16:41:02.172] [warning][task_manager] [illegal_argument_exception] The mapping definition cannot be nested under a type [_doc] unless include_type_name is set to true.
  log   [16:41:05.179] [info][task_manager] Installing .kibana_task_manager index template version: 7000099.
  log   [16:41:05.181] [warning][task_manager] [illegal_argument_exception] The mapping definition cannot be nested under a type [_doc] unless include_type_name is set to true.
  log   [16:41:08.189] [info][task_manager] Installing .kibana_task_manager index template version: 7000099.
  log   [16:41:08.191] [warning][task_manager] [illegal_argument_exception] The mapping definition cannot be nested under a type [_doc] unless include_type_name is set to true.
  log   [16:41:11.197] [info][task_manager] Installing .kibana_task_manager index template version: 7000099.
  log   [16:41:11.199] [warning][task_manager] [illegal_argument_exception] The mapping definition cannot be nested under a type [_doc] unless include_type_name is set to true.
  log   [16:41:14.205] [info][task_manager] Installing .kibana_task_manager index template version: 7000099.
  log   [16:41:14.207] [warning][task_manager] [illegal_argument_exception] The mapping definition cannot be nested under a type [_doc] unless include_type_name is set to true.
  log   [16:41:17.211] [info][task_manager] Installing .kibana_task_manager index template version: 7000099.
  log   [16:41:17.212] [warning][task_manager] [illegal_argument_exception] The mapping definition cannot be nested under a type [_doc] unless include_type_name is set to true.

[elasticmachine]

Pinging @elastic/kibana-platform

[tsullivan]

Closed by #30261