PLT-6472: Basic Elastic Search implementation. (#6382)

* PLT-6472: Basic Elastic Search implementation.

This currently supports indexing of posts at create/update/delete time.
It does not support batch indexing or reindexing, and does not support
any entities other than posts yet. The purpose is to more-or-less
replicate the existing full-text search feature but with some of the
immediate benefits of using elastic search.

* Alter settings for AWS compatability.

* Remove unneeded i18n strings.

utils/config.go

@@ -492,6 +492,11 @@ func getClientConfig(c *model.Config) map[string]string {
 			props["PasswordRequireNumber"] = strconv.FormatBool(*c.PasswordSettings.Number)
 			props["PasswordRequireSymbol"] = strconv.FormatBool(*c.PasswordSettings.Symbol)
 		}
+
+		if *License.Features.ElasticSearch {
+			props["ElasticSearchEnableIndexing"] = strconv.FormatBool(*c.ElasticSearchSettings.EnableIndexing)
+			props["ElasticSearchEnableSearching"] = strconv.FormatBool(*c.ElasticSearchSettings.EnableSearching)
+		}
 	}
 
 	return props
@@ -560,6 +565,16 @@ func Desanitize(cfg *model.Config) {
 		cfg.SqlSettings.AtRestEncryptKey = Cfg.SqlSettings.AtRestEncryptKey
 	}
 
+	if *cfg.ElasticSearchSettings.ConnectionUrl == model.FAKE_SETTING {
+		*cfg.ElasticSearchSettings.ConnectionUrl = *Cfg.ElasticSearchSettings.ConnectionUrl
+	}
+	if *cfg.ElasticSearchSettings.Username == model.FAKE_SETTING {
+		*cfg.ElasticSearchSettings.Username = *Cfg.ElasticSearchSettings.Username
+	}
+	if *cfg.ElasticSearchSettings.Password == model.FAKE_SETTING {
+		*cfg.ElasticSearchSettings.Password = *Cfg.ElasticSearchSettings.Password
+	}
+
 	for i := range cfg.SqlSettings.DataSourceReplicas {
 		cfg.SqlSettings.DataSourceReplicas[i] = Cfg.SqlSettings.DataSourceReplicas[i]
 	}