GRN-80: Allow local accounts on multitenant (#428)

* Changed the way the omniauth providers are declared

* Allow local authentication for multitenant mode based on customer settings

* Cleanead up code mandated by rubocop

* Completed implementation for signin and added the one for signup

* Fixed issue with rubocop

* Renamed customer_name to lb_user

* Renamed lb_user -> user_domain, fixed issue with signup controller, email verification WAS NOT implemented

* Completed implementation of email_verification

* Fixed rubocop issue

* Final update

* Fix for test with loadbalancer

* Make sure loadbalancer mockup is only used when env defined

* Fix for test on rooms_controller

* Fixed most of the test failing on multitenant env

* Fixed issue detected by rubocop

* Fixed issue with activation tockens not working on resend

* Fixed new issue found by rubocop

* Updated travis script

* Harcoded credentials for mockup

* Updated expectation on start_session

* Fixed issue with duplication of home room

* Updated script for rubocop

* Restored Gemfile

config/routes.rb

@@ -38,7 +38,7 @@ Rails.application.routes.draw do
   scope '/account_activations' do
     get '/', to: 'account_activations#show', as: :account_activation
     get '/edit', to: 'account_activations#edit', as: :edit_account_activation
-    get '/resend', to: 'account_activations#resend', as: :resend_email
+    post '/resend', to: 'account_activations#resend', as: :resend_email
   end
 
   # User resources.