r16: Simplify dn_in_container and make work with current VAS3.
r16: Simplify dn_in_container and make work with current VAS3.

Replaced vas_auth_check_client_membership() with a temporary macro that 
returns VAS_ERR_INTERNAL.  It should be available in VAS soon.

dell-oss/mod_auth_vas,dell-oss/mod_auth_vas