config_drive is optional in server create request
config_drive is optional in server create request

curl -g -i -X POST http://xxxx/servers  -d '{"server":
{"min_count": 1, "flavorRef": "84", "name": "t8",
"imageRef": "9eee793a-25e5-4f42-bd9e-b869e60d3dbd", "max_count": 1}}'
is able to create a server ,so the config_drive is optional

Change-Id: I04e30675238d1cebaf7fa8e4a01566db0e064f3c
Partial-Bug: #1515222

Tesora/tesora-api-site,dreamhost/api-site,openstack/api-site,Tesora/tesora-api-site,openstack/api-site,dreamhost/api-site,openstack/api-site,Tesora/tesora-api-site,Tesora/tesora-api-site,dreamhost/api-site,dreamhost/api-site,openstack/api-site,dreamhost/api-site,Tesora/tesora-api-site,dreamhost/api-site,Tesora/tesora-api-site,dreamhost/api-site,Tesora/tesora-api-site