Enable the changes to the ELASTIC_SEARCH_CONFIG setting to be read from…

Enable the changes to the ELASTIC_SEARCH_CONFIG setting to be read from cms.env.json or yaml as it is for the lms.

cms/envs/aws.py

@@ -357,6 +357,8 @@ if FEATURES['ENABLE_COURSEWARE_INDEX'] or FEATURES['ENABLE_LIBRARY_INDEX']:
     # Use ElasticSearch for the search engine
     SEARCH_ENGINE = "search.elastic.ElasticSearchEngine"
 
+ELASTIC_SEARCH_CONFIG = ENV_TOKENS.get('ELASTIC_SEARCH_CONFIG', [{}])
+
 XBLOCK_SETTINGS = ENV_TOKENS.get('XBLOCK_SETTINGS', {})
 XBLOCK_SETTINGS.setdefault("VideoDescriptor", {})["licensing_enabled"] = FEATURES.get("LICENSING", False)
 XBLOCK_SETTINGS.setdefault("VideoModule", {})['YOUTUBE_API_KEY'] = AUTH_TOKENS.get('YOUTUBE_API_KEY', YOUTUBE_API_KEY)