Simplify a condition
Simplify a condition

This patch simplify the conditions
in servers.py (in nova api). The
description define was more complex until now here.
This patch transform the code, that the
description have a default value (name) and
if the api version request is supported, then
call the server_dict get method, which return
with server description. If this not defined,
then return with None, like before as this patch.

Change-Id: Ib74949972f23045f226613bd85d88cc6cd96d046

jianghuaw/nova,gooddata/openstack-nova,Juniper/nova,vmturbo/nova,gooddata/openstack-nova,klmitch/nova,vmturbo/nova,jianghuaw/nova,mikalstill/nova,jianghuaw/nova,vmturbo/nova,mahak/nova,mikalstill/nova,Juniper/nova,vmturbo/nova,mahak/nova,Juniper/nova,klmitch/nova,Juniper/nova,mahak/nova,gooddata/openstack-nova,phenoxim/nova,openstack/nova,klmitch/nova,rahulunair/nova,openstack/nova,gooddata/openstack-nova,rahulunair/nova,openstack/nova,jianghuaw/nova,phenoxim/nova,klmitch/nova,mikalstill/nova,rahulunair/nova