YDB FQ: fix external datasource tests (#6471)

Author: skywalker-jpg

ydb/core/kqp/provider/yql_kikimr_gateway_ut.cpp

@@ -422,6 +422,7 @@ Y_UNIT_TEST_SUITE(KikimrIcGateway) {
                 LOCATION="my-bucket",
                 AUTH_METHOD="BASIC",
                 LOGIN="mylogin",
+                DATABASE_NAME="postgres",
                 PASSWORD_SECRET_NAME=")" << secretId << R"("
             );)";
         auto result = session.ExecuteSchemeQuery(query).GetValueSync();
@@ -458,6 +459,7 @@ Y_UNIT_TEST_SUITE(KikimrIcGateway) {
                 SERVICE_ACCOUNT_ID="mysa",
                 SERVICE_ACCOUNT_SECRET_NAME=")" << secretSaId << R"(",
                 LOGIN="mylogin",
+                DATABASE_NAME="postgres",
                 PASSWORD_SECRET_NAME=")" << secretPasswordId << R"("
             );)";
         auto result = session.ExecuteSchemeQuery(query).GetValueSync();

ydb/core/tx/schemeshard/ut_external_data_source/ut_external_data_source.cpp

@@ -46,6 +46,10 @@ Y_UNIT_TEST_SUITE(TExternalDataSourceTest) {
                         key: "mdb_cluster_id",
                         value: "id"
                     }
+                    Properties {
+                        key: "database_name",
+                        value: "postgres"
+                    }
                 }
             )", {NKikimrScheme::StatusAccepted});