Do not set Location header on HTTP/OK (200) responses

Previously v1 API was setting 'Location' header on responses that
did not require it.  The is incompatible with RFC-2616 §14.30, and
causes some webstacks to convert the 200 response to 302 Found.
This had the consequence of forcing a redirect loop in glance
client.

This patch removes 3 superfluous 'Location' header additions in
the v1 image API.

Change-Id: Ic971ec356f80dff5a9e6f2f16d242a06341a142f
Closes-bug: 1299095
Signed-off-by: Dave Walker (Daviey) <email@daviey.com>
Merge "Do not set Location header on HTTP/OK (200) responses"