Encode the body for passing through oauth2

When not encoded ended up with
``` self['oauth_body_hash'] = base64.b64encode(sha1(self.body).digest())
   TypeError: Unicode-objects must be encoded before hashing
   ```

spotseeker_restclient/dao_implementation/live.py

@@ -33,6 +33,6 @@ def get_live_url(method,
 
     resp, content = client.request(url,
                                    method=method,
-                                   body=body,
+                                   body=body.encode('utf-8'),
                                    headers=headers)
     return (resp, content)