Fix no-op memcached cache flush in restore.sh

The post-restore cleanup ran 'echo echo "flush_all" | nc ... memcached',
which sends the literal string 'echo flush_all' to memcached. That is not a
valid command, so memcached replies ERROR and the cache is never flushed.
Drop the duplicated echo so the intended 'flush_all' command is sent.

Author: Valyrian-Code

src/geonode_project/br/restore.sh

@@ -89,7 +89,7 @@ if md5sum -c /$BKP_FOLDER_NAME/$NEW_UUID/$BKP_FILE_NAME.md5; then
         echo "-----------------------------------------------------"
         echo " Cleanup memcached"
         echo "-----------------------------------------------------"
-        echo echo "flush_all" | nc -q 1 memcached 11211
+        echo "flush_all" | nc -q 1 memcached 11211
         echo "-----------------------------------------------------"
         echo "Cache cleanup done"
         echo "-----------------------------------------------------"