[#1767] Refactor allura_import to do ticket-by-ticket import and use API module.
[#1767] Refactor allura_import to do ticket-by-ticket import and use API module.

Signed-off-by: Paul Sokolovsky <a782451d4c41e36a75176c073353e153afe24dd2@geek.net>

Bitergia/allura,lym/allura-git,Bitergia/allura,heiths/allura,apache/incubator-allura,leotrubach/sourceforge-allura,apache/incubator-allura,apache/allura,heiths/allura,Bitergia/allura,heiths/allura,heiths/allura,apache/allura,apache/incubator-allura,lym/allura-git,Bitergia/allura,apache/allura,apache/incubator-allura,lym/allura-git,leotrubach/sourceforge-allura,Bitergia/allura,heiths/allura,leotrubach/sourceforge-allura,leotrubach/sourceforge-allura,lym/allura-git,apache/allura,apache/allura,lym/allura-git