Bugfix in DetCondKeyTransCnv_p1::transToPers()
The bug resulted in wrong persistent representations of DetCondKeyTrans
objects.
These objects are written out only by one specialized algorithm, which is used for
writing LAr alignment constants to COOL. New versions of these constants are produced
extremely rarely, that's why the bug remained unnoticed for a long time.
No need to sweep this fix into master. Master version has already been fixed by @ssnyder
FYI @gunal