LDAP adaptor initialization exceptions cannot be handled

[btapia]

Currently, in the callback_phase, none of the exceptions raised by the initialization of OmniAuth::LDAP::Adaptor are captured and derived to the fail!() method, giving no opportunity to be handled by the application.

The initialization is being done outside the begin-rescue block.

def callback_phase
  @adaptor = OmniAuth::LDAP::Adaptor.new @options

  return fail!(:missing_credentials) if missing_credentials?
  begin
    @ldap_user_info = @adaptor.bind_as(:filter => filter(@adaptor), :size => 1, :password => request['password'])
    return fail!(:invalid_credentials) if !@ldap_user_info

    @user_info = self.class.map_user(@@config, @ldap_user_info)
    super
  rescue Exception => e
    return fail!(:ldap_error, e)
  end
end