beta: NFS no longer used for mediawiki deployment

Remove file management for the now empty
/data/project/apache/common-local directory that was used to deploy
mediawiki in beta prior to scap being implemented there in late April.

Also cleanup a symlink for Parsoid that is a remnant from the time that
the node service and PHP extension were kept in the same repository.

Change-Id: I0c2b7517da6e6be60b2a8d68588c3c8b2760a05b
Merge "beta: NFS no longer used for mediawiki deployment" into production