NXIO-143: add unit to start vblob-service
NXIO-148: Add CAS authentication
NXIO-148: add unit to set the global configuration when starting the cluster
NXIO-148: update ftest to bypass SSO
NXIO-148: extract CAS conf in its own template; update test
 NXIO-148: fix nuxeo.io and cas templates
NXIO-153 update cloudinit and aws template