added email presence validation to openid

closes #1658

added test for openid

fixed robocup offences

written tests for email presence validation

minor changes

shifted omniauth callback tests to rspec controllers

fixed linting bug

minor changes

minor changes

app/controllers/users/omniauth_callbacks_controller.rb

@@ -11,6 +11,11 @@ module Users
 
     def handle(provider)
       auth_hash = request.env['omniauth.auth']
+      unless auth_hash.info.email.present?
+        flash[:error] = "Email field is missing in your #{provider} account"
+        redirect_to new_user_registration_path
+        return
+      end
       username = auth_hash.info.email.split('@')[0]
       openid = Openid.find_for_oauth(auth_hash) # Get or create openid
       # If openid exists and is associated with a user, sign in with associated user,