[TYPO3-english] ig_ldap_sso_auth issue

[Hebus.JD]

I found what happened!
The template file was not loaded!
I had to include static (from extension) ig_ldap_sso_auth in order to 
get static/setup.txt used. On the other side, my constants.txt is not 
loaded, and I can't figure why! So I added  "templateFile = 
EXT:ig_ldap_sso_auth/res/cas_authentication.html" in the constant of my 
template file, and surprise! my caslogin form appear!
So I have removed the classic login form and keep only the cas one

Is there a cleaner way to do so ?