Use ephemeral=0 to create flavor without ephemeral disk

When creating flavor, whether <"ephemeral": 0> is included
in request body will get same results <"OS-FLV-EXT-DATA:ephemeral": 0>,
so we needn't use different code to create flavor with or without
ephemeral disk.
Besides, it seems not necessary to use different flavor names for
flavor with or without ephemeral disk, the info can easily be got
from flavor info. So the code can become more simple.

Change-Id: If0a63ff401f34caebff00b7925b08fe02b3eb5d3
1 file changed