Setting preference maybe rollback when execute multiple targetcli requests concurrently

[zoumingzhe]

ConfigShell always initialization new Console object.

However, the lockfile need to be opened before requesting flock.
At this time, an exception may occur and need to be output to the console.
Currently, ConfigShell always initializes a new Console object.
So, ConfigShell is initialized first to be able to print information.
The prefs.bin file will be loaded when ConfigShell is initialized.
In this case, the old value may be read, if a new preference is being set and not saved.
Even worse, if this is also a setting command, the previous setting will be rolled back.