Problem/Motivation
Follow-up to #2625258: LocaleConfigManager::updateConfigTranslations() deletes translations if a config object's name happens to match that of a shipped configuration object which added @internal methods and properties to not introduce any code breakages in 8.0.x
Proposed resolution
Rename the property $_configManager and make it protected. Replace _setConfigManager and _getConfigManager with constructor injection.
Remaining tasks
None
User interface changes
None
API changes
None
Data model changes
None
