Redo kerberos auth to server if we receive a 401 reponse, but only retry once for each 401.
Testing shows that 2012 will not honor your kerb auth if you've gove >= 15 seconds without a new request
Merge branch 'fixrspec' into renewkrbauth
Add rspec test to make sure kerberos reauth with 18 second sleep works
Merge branch 'pr/57' into winrm-1.3
Moved auth_timeout_spec to new spec location