[client] Auth token cache file name should include OOZIE_URL

We have a program that connects to multiple Oozie clusters with multiple AuthOozieClient instances, which frequently request the KDC server because the authentication token cache is invalid.

After some investigation we found that the auth token cache file is incorrectly shared by all AuthOozieClient instances. Therefore, we propose that the auth token cache file name include Oozie URL as postfix.