[api][webui] Catch ActiveRecord::RecordInvalid errors when updating c…

…hannels and report them to errbit.

Updating channels mostly happens via delayed jobs. To make such errors visible
we need to pipe exceptions to errbit to get aware of it.

src/api/app/models/package.rb

@@ -542,7 +542,15 @@ def find_changed_issues
   def update_channel_list
     if self.is_channel?
       xml = Suse::Backend.get(self.source_path('_channel'))
-      self.channels.first_or_create.update_from_xml(xml.body.to_s)
+      begin
+        self.channels.first_or_create.update_from_xml(xml.body.to_s)
+      rescue ActiveRecord::RecordInvalid => e
+        if Rails.env.test?
+          raise e
+        else
+          HoptoadNotifier.notify(e, { failed_job: "Couldn't store channel" })
+        end
+      end
     else
       self.channels.destroy_all
     end