rrepair: fix resolve creating non-unique key lists
rrepair: fix resolve creating non-unique key lists

if a KVV or key list contains duplicates of replicated items, unnecessary data is transferred and thus map_kvv_list/2 contains a debug check which then fails
-> we now ensure that these lists only contain unique samples for each replica group
jvf/scalaris,scalaris-team/scalaris,scalaris-team/scalaris,caijieming-baidu/scalaris,caijieming-baidu/scalaris,scalaris-team/scalaris,caijieming-baidu/scalaris,caijieming-baidu/scalaris,jvf/scalaris,jvf/scalaris,scalaris-team/scalaris,scalaris-team/scalaris,jvf/scalaris,jvf/scalaris,scalaris-team/scalaris,jvf/scalaris,caijieming-baidu/scalaris,caijieming-baidu/scalaris,scalaris-team/scalaris,jvf/scalaris,caijieming-baidu/scalaris,scalaris-team/scalaris