statistics: remove references to Lucid from scripts

statistics: remove references to Lucid from scripts

Both init.d and uci-defaults scripts included in luci-app-statistics
still contained stuff related to lucid, which package was removed by
https://github.com/openwrt/luci/commit/91b97bc9f625d09431dc1c753209a037d7c42fbc

Changes to scripts:
* init.d: lucid reference removed,
          /var/etc creation moved earlier (before first possible use)
* uci-defaults: lucid parameters & restart removed
  (but busybox httpd stuff was left intact, although it might be unnecessary)

Signed-off-by: Hannu Nyman <hannu.nyman@iki.fi>
(cherry picked from commit 0d5070c51089deb448476f1abadcea8e185eaf9b)