add extra test for the hashindex
add extra test for the hashindex

Insert a few keys, delete some of them, check we still have
the values we expect, check the deleted ones aren't there.

edgimar/borg,edgimar/borg,edgewood/borg,RonnyPfannschmidt/borg,RonnyPfannschmidt/borg,edgewood/borg,RonnyPfannschmidt/borg,RonnyPfannschmidt/borg,raxenak/borg,raxenak/borg,edgimar/borg,edgewood/borg,raxenak/borg,edgewood/borg,raxenak/borg,edgimar/borg,RonnyPfannschmidt/borg