Disable Kafka metricsets based on Jolokia

CHANGELOG.next.asciidoc

@@ -340,6 +340,7 @@ https://github.com/elastic/beats/compare/v7.0.0-alpha2...master[Check the HEAD d
 - Fix ec2 disk and network metrics to use Sum statistic method. {pull}20680[20680]
 - Fill cloud.account.name with accountID if account alias doesn't exist. {pull}20736[20736]
 - The `elasticsearch/index` metricset only requests wildcard expansion for hidden indices if the monitored Elasticsearch cluster supports it. {pull}20938[20938]
+- Disable Kafka metricsets based on Jolokia by default. They require a different configuration. {pull}20989[20989]
 
 *Packetbeat*
 

metricbeat/docs/modules/kafka/broker.asciidoc

@@ -9,7 +9,6 @@ beta[]
 
 include::../../../module/kafka/broker/_meta/docs.asciidoc[]
 
-This is a default metricset. If the host module is unconfigured, this metricset is enabled by default.
 
 ==== Fields
 

metricbeat/docs/modules/kafka/consumer.asciidoc

@@ -9,7 +9,6 @@ beta[]
 
 include::../../../module/kafka/consumer/_meta/docs.asciidoc[]
 
-This is a default metricset. If the host module is unconfigured, this metricset is enabled by default.
 
 ==== Fields
 

metricbeat/docs/modules/kafka/producer.asciidoc

@@ -9,7 +9,6 @@ beta[]
 
 include::../../../module/kafka/producer/_meta/docs.asciidoc[]
 
-This is a default metricset. If the host module is unconfigured, this metricset is enabled by default.
 
 ==== Fields
 

metricbeat/module/kafka/broker/manifest.yml

@@ -1,4 +1,4 @@
-default: true
+default: false
 input:
   module: jolokia
   metricset: jmx

metricbeat/module/kafka/consumer/manifest.yml

@@ -1,4 +1,4 @@
-default: true
+default: false
 input:
   module: jolokia
   metricset: jmx

metricbeat/module/kafka/producer/manifest.yml

@@ -1,4 +1,4 @@
-default: true
+default: false
 input:
   module: jolokia
   metricset: jmx