Fix message

Previous fix did not actual work. This fix does however.

lib/ansible/modules/cloud/docker/docker_image.py

@@ -421,10 +421,10 @@ def main():
             # If the above is true it's likely the hostname does not match
             else:
                 environment_error = '''
-                You may need to ignore hostname missmatches by passing
-                -e 'host_key_checking=False' through the command line.
-                If this does not resolve the issue please open an issue
-                at ansible/ansible-modules-core and ping michaeljs1990
+                You may need to ignore hostname missmatches by setting
+                tls_hostname=boot2docker in your role. If this does not
+                resolve the issue please open an issue at
+                ansible/ansible-modules-core and ping michaeljs1990
                 '''
                 module.exit_json(failed=True, chaged=manager.has_changed(), msg="SSLError: " + str(e) + environment_error)
         # General error for non darwin users