Allow to set 'index: false' in dynamic templates defined in data stream manifests (#650)

Author: jsoriano

spec/changelog.yml

@@ -7,6 +7,9 @@
   - description: Using non-GA versions of the spec in GA packages produces a filterable validation error instead of a warning
     type: enhancement
     link: https://github.com/elastic/package-spec/pull/627
+  - description: 'Allow to set index: false in dynamic templates defined in data stream manifests'
+    type: enhancement
+    link: https://github.com/elastic/package-spec/issues/650
 - version: 3.0.0
   changes:
   - description: Validate processors used in ingest pipelines

spec/integration/data_stream/manifest.spec.yml

@@ -300,6 +300,8 @@ spec:
                           $ref: "./fields/fields.spec.yml#/items/properties/default_metric"
                         ignore_above:
                           $ref: "./fields/fields.spec.yml#/items/properties/ignore_above"
+                        index:
+                          $ref: "./fields/fields.spec.yml#/items/properties/index"
                 patternProperties:
                   # Exception for fields imported by elastic-package when import_mappings is used.
                   # TODO: Allow this only on built packages.

test/packages/good_v3/data_stream/foo/manifest.yml

@@ -58,6 +58,21 @@ elasticsearch:
       number_of_shards: 1
     mappings:
       dynamic: strict
+      dynamic_templates:
+        - histogram:
+            mapping:
+              type: histogram
+        - summary:
+            mapping:
+              type: aggregate_metric_double
+              metrics:
+                - sum
+                - value_count
+              default_metric: value_count
+        - double:
+            mapping:
+              type: double
+              index: false
     ingest_pipeline:
       name: foobar
   privileges: