[Metricbeat] Add FailOnRequired when applying schema (#14143)

* Add FailOnRequired when applying schema

CHANGELOG.next.asciidoc

@@ -229,8 +229,9 @@ https://github.com/elastic/beats/compare/v7.0.0-alpha2...master[Check the HEAD d
 - Fix `docker.cpu.system.pct` calculation by using the reported number online cpus instead of the number of metrics per cpu. {pull}13691[13691]
 - Fix rds metricset dashboard. {pull}13721[13721]
 - Ignore prometheus untyped metrics with NaN value. {issue}13750[13750] {pull}13790[13790]
-- Change kubernetes.event.message to text {pull}13964[13964]
-- Fix performance counter values for windows/perfmon metricset.{issue}14036[14036] {pull}14039[14039]
+- Change kubernetes.event.message to text. {pull}13964[13964]
+- Fix performance counter values for windows/perfmon metricset. {issue}14036[14036] {pull}14039[14039]
+- Add FailOnRequired when applying schema and fix metric names in mongodb metrics metricset. {pull}14143[14143]
 
 *Packetbeat*
 

metricbeat/docs/fields.asciidoc

@@ -20014,7 +20014,7 @@ Reports data from the query execution system.
 
 
 
-*`mongodb.metrics.query_executor.scanned_indexes`*::
+*`mongodb.metrics.query_executor.scanned_indexes.count`*::
 +
 --
 The total number of index items scanned during queries and query-plan evaluation.
@@ -20024,7 +20024,7 @@ type: long
 
 --
 
-*`mongodb.metrics.query_executor.scanned_documents`*::
+*`mongodb.metrics.query_executor.scanned_documents.count`*::
 +
 --
 The total number of documents scanned during queries and query-plan evaluation.
@@ -20468,7 +20468,7 @@ Reports on the operation of the resource use of the ttl index process.
 
 
 
-*`mongodb.metrics.ttl.deleted_documents`*::
+*`mongodb.metrics.ttl.deleted_documents.count`*::
 +
 --
 The total number of documents deleted from collections with a ttl index.
@@ -20478,7 +20478,7 @@ type: long
 
 --
 
-*`mongodb.metrics.ttl.passes`*::
+*`mongodb.metrics.ttl.passes.count`*::
 +
 --
 The number of times the background process removes documents from collections with a ttl index.