tests: add tests for listAllPads() API call
tests: add tests for listAllPads() API call

--HG--
branch : padlist-use-set

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