Adjusted CBD Test Suite to work with latest Helix Installer script
(and the SDP installer).
Moved logic to acquire CBD scripts from The Workshop, from the
auto_test_cbd_vagrant.sh script into test_cbd.sh, where it is
more accessible (and where it must be now that the latest
Helix Installer blasts the CBD files and the rest of the SDP
structure).
Enhanced logic acquring CBD to clone using remote specs (DVCS
features) rather than a flush/clean in a typical workspace.
Added '-b <branch>' flag to test_cbd.sh to specify which branch
in The Workshop to acquire CBD from.