Provision scap scripts using trebuchet

Step two in a two step process to convert the delivery of the scap
scripts themselves from a puppet managed git clone to a project deployed
by trebuchet.

* Remove use of git::clone in mediawiki::sync
* Change /usr/local/bin/* symlinks to point to trebuchet managed
  checkout of scap

Depends on: I3c9ba6b
Change-Id: Iec5dae6e624e5151cdd5d277b7585c31f3f0b80d
Merge "Provision scap scripts using trebuchet" into production