refactor: change authsamlhelper class to module

Change authsamlhelper class to module, mark as helper for and prefix 
correctly

Author: sneaky-patriki

app/api/authentication_api.rb

@@ -2,7 +2,6 @@
 require 'json/jwt'
 require 'onelogin/ruby-saml'
 require 'entities/user_entity'
-require 'helpers/auth/auth_saml_helper.rb'
 #
 # Provides the authentication API for Doubtfire.
 # Users can sign in via email and password and receive an auth token
@@ -86,10 +85,10 @@ class AuthenticationApi < Grape::API
     end
     post '/auth/jwt' do
         # this endpoint is being deprecated and will be removed
-        AuthSAMLHelper.auth_saml2 params[:SAMLResponse]
+        AuthSamlHelper.auth_saml2 params[:SAMLResponse]
     end
     post '/auth/saml2' do
-        AuthSAMLHelper.auth_saml2 params[:SAMLResponse]
+        AuthSamlHelper.auth_saml2 params[:SAMLResponse]
     end
   end
 

app/helpers/auth/auth_saml_helper.rb

@@ -1,7 +1,7 @@
 require 'json/jwt'
 require 'onelogin/ruby-saml'
 
-class AuthSamlHelper
+module Auth::AuthSamlHelper
     def auth_saml2 (respSAML)
         response = OneLogin::RubySaml::Response.new(respSAML, allowed_clock_drift: 1.second,
                                                                             settings: AuthenticationHelpers.saml_settings)