If a stale snapshot is detected, the full data load proceeds even
if the option to skip data load was set. A check is added to fail
immediately if this happens for isilon or s3 because the full data
load will not work on these filesystems currently.
Change-Id: I98faaa4a66e5715bd86289a56d199599b9011f52
Reviewed-on: http://gerrit.cloudera.org:8080/2811
Reviewed-by: Harrison Sheinblatt <hs7@hotmail.com>
Tested-by: Internal Jenkins