Compatibility update for Parsoid puppetization

- Parsoid now consists of two repositories:
  - mediawiki/services/parsoid/deploy: node_modules, debian/, etc.
  - mediawiki/services/parsoid: parsoid source
  The latter repository is a submodule of the former, so doing a recursive
  clone of the deploy repo is sufficient.
- deploy repo contains all required node_modules, so npm is longer needed.
- The init.d compatibility layer was specific to MediaWiki-Vagrant and never
  needed in the first place.

TODOs:
- The Parsoid team ships their own Upstart job configuration now; check whether
  we can use it instead of rolling our own.
- ..or just use the Debian package, once it's ready.
- localsettings.js seems to have changed.

Tested.

Change-Id: I58f4ef3df8c46c84e94bc449f26eb8f4d578e757