Merge branch 'saml_social_provider' into '7-12-stable'

Merge branch 'SAML_1888' into 'master'

Add SAML to list of social_provider

See merge request !894

app/helpers/oauth_helper.rb

@@ -13,7 +13,7 @@ def enabled_oauth_providers
   def enabled_social_providers
     enabled_oauth_providers.select do |name|
-      [:twitter, :gitlab, :github, :bitbucket, :google_oauth2].include?(name.to_sym)
+      [:saml, :twitter, :gitlab, :github, :bitbucket, :google_oauth2].include?(name.to_sym)
     end
   end