[Filebeat] Palo_alto module improvements (elastic#12182)

This PR adds some missing features to the recently merged palo_alto module:

Dashboards (One for traffic logs, one for threats).
Sets network.type to either ipv4 or ipv6.
Renames palo_alto.pan_os.threat_file_or_url to palo_alto.pan_os.threat.resource.
Splits palo_alto.pan_os.threat_id into palo_alto.pan_os.threat.id and palo_alto.pan_os.threat.name.

filebeat/docs/fields.asciidoc

@@ -12046,7 +12046,7 @@ Log entry identifier that is incremented sequentially. Unique for each log type.
 
 --
 
-*`palo_alto.pan_os.threat_file_or_url`*::
+*`palo_alto.pan_os.threat.resource`*::
 +
 --
 type: keyword
@@ -12056,14 +12056,24 @@ URL or file name for a threat.
 
 --
 
-*`palo_alto.pan_os.threat_id`*::
+*`palo_alto.pan_os.threat.id`*::
 +
 --
 type: keyword
 
 Palo Alto Networks identifier for the threat.
 
 
+--
+
+*`palo_alto.pan_os.threat.name`*::
++
+--
+type: keyword
+
+Palo Alto Networks name for the threat.
+
+
 --
 
 [[exported-fields-postgresql]]

filebeat/docs/modules/palo_alto.asciidoc

@@ -121,14 +121,16 @@ in ECS that are added under the `palo_alto` prefix:
 | Device Name | observer.hostname |
 |==============
 
-// [float]
-// === Example dashboard
-//
-// This module comes with a sample dashboard:
-//
-// (TODO)
-// [role="screenshot"]
-// image::./images/kibana-cisco-asa.png[]
+[float]
+=== Example dashboard
+
+This module comes with two sample dashboards:
+
+[role="screenshot"]
+image::./images/filebeat-palo-alto-traffic.png[]
+
+[role="screenshot"]
+image::./images/filebeat-palo-alto-threat.png[]
 
 include::../include/configuring-intro.asciidoc[]
 

x-pack/filebeat/module/palo_alto/_meta/docs.asciidoc

@@ -116,14 +116,16 @@ in ECS that are added under the `palo_alto` prefix:
 | Device Name | observer.hostname |
 |==============
 
-// [float]
-// === Example dashboard
-//
-// This module comes with a sample dashboard:
-//
-// (TODO)
-// [role="screenshot"]
-// image::./images/kibana-cisco-asa.png[]
+[float]
+=== Example dashboard
+
+This module comes with two sample dashboards:
+
+[role="screenshot"]
+image::./images/filebeat-palo-alto-traffic.png[]
+
+[role="screenshot"]
+image::./images/filebeat-palo-alto-threat.png[]
 
 include::../include/configuring-intro.asciidoc[]