Correct test-bifrost-venv script
Correct test-bifrost-venv script

Remove a reference to a nonexistent playbook. Also remove
LOG_LOCATION since we now use collect-test-info.sh.

Change-Id: I646c7d83fa9f16cbe0a95309ab52aa833ebbad66

EntropyWorks/bifrost,bcornec/bifrost,bcornec/bifrost,EntropyWorks/bifrost,openstack/bifrost,openstack/bifrost