db/AuthorManager.js: partial conversion to Promises
db/AuthorManager.js: partial conversion to Promises

storytouch/etherpad-lite,joequant/etherpad-lite,ether/etherpad-lite,storytouch/etherpad-lite,aptivate/etherpad-lite,aptivate/etherpad-lite,joequant/etherpad-lite,storytouch/etherpad-lite,joequant/etherpad-lite,aptivate/etherpad-lite,joequant/etherpad-lite,ether/etherpad-lite,ether/etherpad-lite,aptivate/etherpad-lite