Adds ANALYTICS_API_AGGREGATE_PAGE_SIZE, default value 10

and CHANGELOG entry.

CHANGELOG.md

+- Role: analytics_api
+  - Added `ANALYTICS_API_AGGREGATE_PAGE_SIZE`, default value 10.  Adjust this parameter to increase the number of
+    aggregate search results returned by the Analytics API, i.e. in course_metadata: enrollment_modes, cohorts, and
+    segments.
 - Role: programs
   - This role has been removed as this service is no longer supported. The role is still available on the [Ficus branch](https://github.com/edx/configuration/releases/tag/open-release%2Fficus.1).
 - Role: xqueue

playbooks/roles/analytics_api/defaults/main.yml

@@ -66,6 +66,7 @@ ANALYTICS_API_DATE_FORMAT: '%Y-%m-%d'
 ANALYTICS_API_DATETIME_FORMAT: '%Y-%m-%dT%H%M%S'
 ANALYTICS_API_DEFAULT_PAGE_SIZE: 25
 ANALYTICS_API_MAX_PAGE_SIZE: 100
+ANALYTICS_API_AGGREGATE_PAGE_SIZE: 10
 
 ANALYTICS_API_BASE_URL: 'http://localhost:8100'
 ANALYTICS_API_DATA_DIR: '{{ COMMON_DATA_DIR }}/{{ analytics_api_service_name }}'
@@ -123,6 +124,7 @@ ANALYTICS_API_SERVICE_CONFIG:
   DATETIME_FORMAT: '{{ ANALYTICS_API_DATETIME_FORMAT }}'
   DEFAULT_PAGE_SIZE: '{{ ANALYTICS_API_DEFAULT_PAGE_SIZE }}'
   MAX_PAGE_SIZE: '{{ ANALYTICS_API_MAX_PAGE_SIZE }}'
+  AGGREGATE_PAGE_SIZE: '{{ ANALYTICS_API_AGGREGATE_PAGE_SIZE }}'
   REPORT_DOWNLOAD_BACKEND: '{{ ANALYTICS_API_REPORT_DOWNLOAD_BACKEND }}'
 
 ANALYTICS_API_REPOS: