Data wipe after upgrade to v0.15.2

Confirm too.

root@node:/home/StorjStore/storage/tmp# ls
blob-018858431.partial	blob-088048577.partial	blob-182037527.partial	blob-351749016.partial	blob-623961691.partial	blob-822719331.partial
blob-028807561.partial	blob-129220266.partial	blob-215269002.partial	blob-446031870.partial	blob-679443814.partial	blob-833343980.partial
blob-045277951.partial	blob-134160795.partial	blob-245560551.partial	blob-470833170.partial	blob-697796681.partial	blob-838369607.partial
blob-051321477.partial	blob-161140192.partial	blob-274520461.partial	blob-527196040.partial	blob-769917946.partial	blob-902493740.partial
blob-083985409.partial	blob-165529413.partial	blob-326422113.partial	blob-623376599.partial	blob-812587796.partial	blob-995820817.partial
root@node:/home/StorjStore/storage/tmp# ls | wc -l
30