Don't fail getting flavors if extra_specs is off
Don't fail getting flavors if extra_specs is off

Clouds can turn off extra specs. They're extra - we should not fail
on getting flavors if they're not there.

Change-Id: I6352fa2d64d3e92f823004a5b9f4cbfe61f11403

stackforge/python-openstacksdk,dtroyer/python-openstacksdk,openstack-infra/shade,openstack/python-openstacksdk,stackforge/python-openstacksdk,openstack/python-openstacksdk,dtroyer/python-openstacksdk,openstack-infra/shade