GRN2-252: Change to how sign ins are processed (#869)

* Social to local

* Social/Local to Social

* Rubocop fixes

* Added test cases

* Added the ability to clear social uids

* Update admins_controller.rb

* Update admins_controller.rb

spec/controllers/password_resets_controller_spec.rb

@@ -115,7 +115,7 @@ describe PasswordResetsController, type: :controller do
       end
 
       it "updates attributes if the password update is a success" do
-        user = create(:user)
+        user = create(:user, provider: "greenlight")
         token = "reset_token"
 
         cost = ActiveModel::SecurePassword.min_cost ? BCrypt::Engine::MIN_COST : BCrypt::Engine.cost