Re: [rhinstaller/blivet/pulls/163 master] LUKS resize

[dashea]

I could make the commit message for aaaeede more explicit, something like:

anaconda's pyananaconda.errors.ErrorHandler class defines an error handler
_fsResizeHandler(), and a lookup function, cb(), which does lookup on this precise error type.
The error handler just provides a little more information, and then re-raises the exception.
The errorHandler, and the lookup for FSResizeError should both be removed at some point,
as they will have become dead as a result of this patch.
However, no anaconda error should result from this patch,
and the anaconda spec does not need to be updated for this patch.

Also, since we're moving into deprecation for real, it might make sense to deprecate FSResizeError class.