[digitalocean] Check to see if we have a digital ocean api key before attempting to delete servers
[openstack|storage] Added storage example to set the account quota

See also #1632
Merge pull request #1729 from bvox/openstack-storage-example

[openstack|storage] Added storage example to set the account quota
Merge pull request #1728 from rackspace/digitalocean_exit

[digitalocean] Check to see if digitalocean_api_key exists before running exit code