Issue #2166703 by alexpott: Config SchemaStorage uses InstallStorage.

core/core.services.yml

core/includes/config.inc

core/includes/install.core.inc

core/lib/Drupal/Core/Config/ConfigInstaller.php

core/lib/Drupal/Core/Config/ExtensionInstallStorage.php

core/lib/Drupal/Core/Config/Schema/SchemaStorage.php

.../lib/Drupal/Core/Config/Schema/core.data_types.schema.yml

core/lib/Drupal/Core/Config/TypedConfigManager.php

core/lib/Drupal/Core/Config/TypedConfigManagerInterface.php

core/lib/Drupal/Core/Extension/ModuleHandler.php

...ules/config/lib/Drupal/config/Tests/ConfigInstallTest.php

...ests/config_test/config/config_test.schema_in_install.yml

...ig/tests/config_test/config/schema/config_test.schema.yml

...upal/migrate_drupal/Tests/d6/MigrateActionConfigsTest.php

.../migrate_drupal/Tests/d6/MigrateAggregatorConfigsTest.php

...Drupal/migrate_drupal/Tests/d6/MigrateBookConfigsTest.php

...pal/migrate_drupal/Tests/d6/MigrateContactConfigsTest.php

...rupal/migrate_drupal/Tests/d6/MigrateDblogConfigsTest.php

...Drupal/migrate_drupal/Tests/d6/MigrateFileConfigsTest.php

...rupal/migrate_drupal/Tests/d6/MigrateForumConfigsTest.php