code: def _execCmd(self, cmd, args):
          
          output = self._eslconn.api(cmd, args)
          if output:
              body = output.getBody()
              if body:
                  return body.splitlines()
          return None
docs: Execute command and return result body as list of lines.
          
              @param cmd:  Command string.
              @param args: Comand arguments string. 
              @return:     Result dictionary.