Webfile bundle loading

In development mode (autoreload service enabled), loading of webfilebundles provided as jar only (no filesystem), would be skipped.

In order to fix this behavior, following actions should be taken:

1. Add WebFilesWatcherService service (getWebFilesDirectories()) for getting watched webfile bundle directories by AutoReloadService
2. Add atomic WebFilesServiceImpl#importJcrWebFileBundle() method which isn't conditional on AutoreloadService being unavailable/disabled 

Futher actions:

1. Modify ConfigurationServiceImpl/ConfigurationConfigService webfilebundle loading approach: Load all webfilebundles from jars if WebFilesWatcherService == null (i.e. AutoReloadService is unavailable/disabled) or if the module is not already known and managed (loaded) by the WebFilesWatcherService