Allow name argument to flavor-access-add

Administrator cannot use the flavor name in arguments of
"nova flavor-access-add" and "nova flavor-access-remove"
in following conditions.

1. The flavor is non-public.
2. The falvor doesn't belong administrator's tenant.

This patch fixes this problem.

Change-Id: Ic5e3222d0ff62667e003a61e6a94e85833da5d11
Fixes: bug #1205298
Update oslo

Update gettext, striutils, timeutils and install_venv_common
from oslo.

Change-Id: Ibd9067e3e2be335ef75f0e4a5e4000d143030ab7
Signed-off-by: Chuck Short <chuck.short@canonical.com>
Update mailmap

Change-Id: Ic3050ae029b367f099346dc99e76e33bd47bdc33
Update mailmap

Change-Id: I0f1f8b65db311fee9303dcf1a68c8057d9d778ab
Merge "Update oslo"
Merge "Update mailmap"
Merge "Update mailmap"
Merge "Allow name argument to flavor-access-add"