dump_to_dict not working for empty dump subdirs
dump_to_dict not working for empty dump subdirs

Example:

In /var/lib/phosphor-debug-collector/dumps, there are the following
subdirectories.  However, 11 is empty.

11  12  13  14  15  16

Change-Id: Ifca568de68ad62e5492b79aae2f01edd7ee431da
Signed-off-by: Michael Walsh <10404802c7de463f402c4a18638106ca1b12ef61@us.ibm.com>

openbmc/openbmc-test-automation,openbmc/openbmc-test-automation