Fix bug: error'd repositories weren't logged if a child repo was synced

Fix bug: error'd repositories weren't logged if a child repo was synced

+If a parent repository wasn't successfully synced (eg. LACNIC) but a child repository was synced (eg. Brazil), the errors related to the parent repository weren't logged to the operation log.
+Fix this by poping the working repository from the TA, since this was causing the error. All the repositories were erroneously related, so on success of any of them, the error logs were discarded.
+Two additional updates are done: don't rsync when forcing the download of an URI whose ancestor had a previous error, and remove line breaks from stale repositories summary.
+Rename some local variables to aid dev reading.