The code used to list flavors when in the admin
or project side was not consistent and raised
alerts if viewing in the admin side but not in the
project side.
This patch moves their behaviour to be consistent
and refactors the code to use the same code-base.
Closes-Bug: #2042362
Change-Id: I37cc02102285b1e83ec1343b710a57fb5ac4ba15
aa21f4baa3