Don't create Image Dir if not present
Don't create Image Dir if not present

Return error if the Image directory is not present.
The Upload code should not create the image dir, instead the
code update or the inotify code should create it.
Even if the Upload code creates the directory,
the inotify is not looking for a file in that dir and won't
untar it. We saw this with 2544. Although not the root cause of
2544 this change would have let the user know sooner (on upload),
that there was a problem.

Change-Id: I9f161354e1c3243567efb73b6974e8f52ff4c5db
Signed-off-by: Gunnar Mills <213d3186dd7abf62ec3e856bb92d7b256149744c@us.ibm.com>

openbmc/phosphor-rest-server,openbmc/phosphor-rest-server