Add new environment tag to default tags for quickstart.sh
Add new environment tag to default tags for quickstart.sh

Fixes https://github.com/redhat-openstack/tripleo-quickstart/issues/61
Change-Id: Ib3c575697630b23c0f8d4c5db513d122a17f9614

redhat-openstack/tripleo-quickstart,redhat-openstack/tripleo-quickstart