Bump omniauth_openid_connect to 0.3.1

In https://gitlab.com/gitlab-org/gitlab-ce/issues/62208, users were
seeing 404 errors when they configured their OpenID provider without a
name parameter since OmniAuth would use the name `openidconnect` instead
`openid_connect`.

https://github.com/m0n9oose/omniauth_openid_connect/pull/23 makes the
default parameter `openid_connect` so this additional initializer in
GitLab is not necessary. Plus, this change enables users to use multiple
OpenID Connect providers if they desire.

Gemfile

@@ -41,7 +41,7 @@ gem 'omniauth-shibboleth', '~> 1.3.0'
 gem 'omniauth-twitter', '~> 1.4'
 gem 'omniauth_crowd', '~> 2.2.0'
 gem 'omniauth-authentiq', '~> 0.3.3'
-gem 'omniauth_openid_connect', '~> 0.3.0'
+gem 'omniauth_openid_connect', '~> 0.3.1'
 gem "omniauth-ultraauth", '~> 0.0.2'
 gem 'omniauth-salesforce', '~> 1.0.5'
 gem 'rack-oauth2', '~> 1.9.3'

Gemfile.lock

@@ -587,7 +587,7 @@ GEM
       activesupport
       nokogiri (>= 1.4.4)
       omniauth (~> 1.0)
-    omniauth_openid_connect (0.3.0)
+    omniauth_openid_connect (0.3.1)
       addressable (~> 2.5)
       omniauth (~> 1.3)
       openid_connect (~> 1.1)
@@ -1159,7 +1159,7 @@ DEPENDENCIES
   omniauth-twitter (~> 1.4)
   omniauth-ultraauth (~> 0.0.2)
   omniauth_crowd (~> 2.2.0)
-  omniauth_openid_connect (~> 0.3.0)
+  omniauth_openid_connect (~> 0.3.1)
   org-ruby (~> 0.9.12)
   peek (~> 1.0.1)
   peek-gc (~> 0.0.2)

lib/gitlab/omniauth_initializer.rb

@@ -63,12 +63,6 @@ module Gitlab
         { remote_sign_out_handler: authentiq_signout_handler }
       when 'shibboleth'
         { fail_with_empty_uid: true }
-      when 'openid_connect'
-        # If a name argument is omitted, OmniAuth will expect that the
-        # matching route is /auth/users/openidconnect instead of
-        # /auth/users/openid_connect because of
-        # https://gitlab.com/gitlab-org/gitlab-ce/issues/62208#note_178780341.
-        { name: 'openid_connect' }
       else
         {}
       end

spec/lib/gitlab/omniauth_initializer_spec.rb

@@ -83,13 +83,5 @@ describe Gitlab::OmniauthInitializer do
 
       subject.execute([cas3_config])
     end
-
-    it 'configures name for openid_connect' do
-      openid_connect_config = { 'name' => 'openid_connect', 'args' => {} }
-
-      expect(devise_config).to receive(:omniauth).with(:openid_connect, name: 'openid_connect')
-
-      subject.execute([openid_connect_config])
-    end
   end
 end