ip_range type not fully supported

[ghost]

Kibana version: 6.3.0

Elasticsearch version: 6.3.0

Server OS version: Ubuntu 16.04

Browser version: Chrome 69

Browser OS version: Windows 10

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

Description of the problem including expected versus actual behavior: When defining an Elastic template with a field of type ip_range, it is expected that Kibana:

• recognizes this field as being of type ip_range when an IP range in CIDR format is inserted in this field, - allows to search inside the range in Discover,
• allows to add this field as a filter and
• allows to do aggregations on it.

Instead of that the field doesn't appear to be recognized (it is shown with a question mark in Discover and as unknown in Index Patterns) but it is possible to search inside the IP range in Discover. Furthermore, it is not possible to:

• add this field as a filter through Add a filter (it doesn't show in the Filter list) but it can be added by clicking on the asterisk next to the field in a document preview,
• do aggregations on it.

Steps to reproduce:

1. PUT template/test-foo
   {
   "order": 1,
   "version": 1,
   "index_patterns": ["test-foo"],
   "settings": {
   "index": {
   "refresh_interval": "30s",
   "analysis": {
   "analyzer": {
   "url_analyzer": {
   "type": "pattern",
   "pattern": "\W|",
   "lowercase": true
   }
   }
   },
   "number_of_shards": "3",
   "number_of_replicas": "1"
   }
   },
   "mappings": {
   "_doc": {
   "properties": {
   "net_range": {
   "type": "ip_range"
   }
   }
   }
   }
   }
2. PUT test-foo/_doc/1
   {
   "net_range" : "192.168.0.0/12"
   }
3. Add test-foo as an index pattern and check in Discover

[bhavyarm]

pinging @elastic/kibana-discovery

[timroes]

Duplicate of #22619

[joealex]

What is the plan for ip_range support in Kibana