FIX : Removed display of login input field when main_authentication == "googleoauth"

[Gouttfi]

FIX : Removed display of login input field when main_authentication == "googleoauth"

When the user edit htdocs/conf/conf.php and set variable $dolibarr_main_authentication to googleoauth, all fields relative to login/password, forgotten password and login button should disapear, but actually, the username field remain visible and alone

This commit fix this behavior and hide the username field with the other fields relative to default Dolibarr authentication system, only if $dolibarr_main_authentication == 'googleoauth'

[hregis]

@Gouttfi @eldy Dolibarr can use different method of authentication !

eg $dolibarr_main_authentication='googleoauth,ldap,dolibarr';

Maybe use a constant instead ?

[eldy]

@Gouttfi @eldy Dolibarr can use different method of authentication !

eg $dolibarr_main_authentication='googleoauth,ldap,dolibarr';

Maybe use a constant instead ?

@hregis this should not be a problem the test is on == "googleoauth", so hide the login only when using only oauth. When we use other method, the field remains visible. What we want.