Rename digital_ocean_ssh to digital_ocean_sshkey per…

Rename digital_ocean_ssh to digital_ocean_sshkey per https://github.com/ansible/ansible/pull/4315#issuecomment-30286556

library/cloud/digital_ocean_ssh → library/cloud/digital_ocean_sshkey

@@ -17,7 +17,7 @@
 # along with Ansible.  If not, see <http://www.gnu.org/licenses/>.
 DOCUMENTATION = '''
 ---
-module: digital_ocean_ssh
+module: digital_ocean_sshkey
 short_description: Create/delete an SSH key in DigitalOcean
 description:
      - Create/delete an SSH key.
@@ -54,7 +54,7 @@ EXAMPLES = '''
 # If a key matches this name, will return the ssh key id and changed = False
 # If no existing key matches this name, a new key is created, the ssh key id is returned and changed = False
 
-- digital_ocean_ssh: >
+- digital_ocean_sshkey: >
       state=present
       name=my_ssh_key
       ssh_pub_key='ssh-rsa AAAA...'