Adding BlueSpice installer overrides for MW installer

Adding all necessary override classes for automatic BlueSpice
installation. Also Added i18n for installer

Added check if ne file or folder already exists that it cannot be
overwritten
Removed test renaming
Improved message
Reduced redundant code

Change-Id: Ie45fa018828226f384f0120fec8e15f4e010fa1e
Merge "Adding BlueSpice installer overrides for MW installer"