Various fixes to htcondor ce tools

* https://jira.opensciencegrid.org/browse/SOFTWARE-1678
* https://jira.opensciencegrid.org/browse/SOFTWARE-1679
* Conditional for SEC_CLIENT_AUTHENTICATION_METHODS that we spoke about adding to the condor_ce_client_env_bootstrap.

I'm realizing I probably should've made separate pull requests for each issue...
Based on experience - can you:

1) Warn if the remote user is gsi@unmapped.
2) Warn if AUTHORIZED is false.

I'm OK if this happens in a follow-up PR - just let me know your preference.