Update flavor showing unexpected behaviour

[Akhil jain]

Passing uuid of some other existing flavor in request arguments
of PATCH request to flavors api, updates flavor with uuid passed
in request argument instead of one in url.

Example:
curl -i -X PATCH -d '{"name":"flavor1234", "uuid":"UUID-1",
"properties":{"memory":{"type":"SSD"}}}'
"http://localhost:8181/v1/flavors/<UUID-2>"
-H "Accept:application/json" -H "Content-Type:application/json"

The above request updates flavor with UUID-1, whereas it should
update flavor with UUID-2