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...
Can we include a timestamp?  Sometimes it's useful to try and align client-side timestamps with the server logs.