take care with Scientific Linux and  case where lsb_release is installed...

... on centos or scientific linux
file bootstrap
   if lsb_release is installed, bootstrap does not  test /etc/redhat-release (fix it)
 and if lsb_release is no installed: take care  of Scientifc linux in the list of supported os.
 file vendor.py (remoto installation)
 setup failed because of  ceph.com url (fix it)


why the change here? this works, how it doesn't work for you that warrants this modification?