Fix readerbookmark unit test
Fix readerbookmark unit test

NickSavage/koreader,ashhher3/koreader,mihailim/koreader,Hzj-jie/koreader,chrox/koreader,Markismus/koreader,houqp/koreader,mwoz123/koreader,apletnev/koreader,lgeek/koreader,Frenzie/koreader,koreader/koreader,chihyang/koreader,koreader/koreader,ashang/koreader,frankyifei/koreader,NiLuJe/koreader,poire-z/koreader,Frenzie/koreader,poire-z/koreader,pazos/koreader,robert00s/koreader,NiLuJe/koreader,noname007/koreader