Issue #1873148: Fixed Libraries should be downloaded from zip files, not cloned from git.

Change-Id: I7a02a152ebe0a3a5ea2b35552d2e34b5639f965d
Reviewed-on: https://code.drupalcommerce.org/662


Tested-by: JenkinsCG <jenkins@drupalcommerce.org>
Reviewed-by: Bojan Zivanovic <bojan@commerceguys.com>