Do not create automatically all required folders for Bob during startup

[ikopylov]

The current behavior conflicts with the disk fail/restore feature: if the disk was disconnected and the bob service was restarted, new folders will be created directly on the system disk, which is incorrect.

For initial folder structure initialization, Bob should be started with an additional command line parameter. In this mode it creates a folder structure, if not presented, during startup (in fact, this just reproduces the current behavior).

If Bob is started without that parameter (normal stat), it should treat the missing folders as if they were on the disk that was taken offline.