tape-admin: rename tape-changer/ltfs administration wrapper

Signed-off-by: Ralf Zerres <ralf.zerres@networkx.de>

bin/tape-admin

@@ -247,6 +247,7 @@ get_slot () {
 	    | .Slot ' \
 	    ${mediapools_json}"
     volume_slot=$(eval $cmd)
+    volume_slot=$(echo $volume_slot | sed -e 's/"//g')
 
     if [ $verbose -ge 3 ]; then
 	printf "${MAGENTA}Slot for volume_name ${GREEN}'%s'${MAGENTA} from media-pool ${GREEN}'%s'${MAGENTA}: ${NO_COLOR}%s${NO_COLOR}\n" \