增加delete_disk处理
Merge branch 'master' of https://github.com/Bosh-for-Cpi/bosh-2605
describe_security_groups添加
Merge branch 'master' of https://github.com/Bosh-for-Cpi/bosh-2605
create_vm修改
Merge branch 'master' of https://github.com/Bosh-for-Cpi/bosh-2605
create_vm CPI增加
Merge branch 'master' of https://github.com/Bosh-for-Cpi/bosh-2605

Conflicts:
	bosh_qingcloud_cpi/lib/cloud/qingcloud/cloud.rb
	bosh_qingcloud_cpi/lib/cloud/qingcloud/qingcloudsdk.rb