Added ssh key on for ubuntu@teuthology for generic access to machines for people
with access to teuthology. This key will later be installed by default by anything
created via downburst.
--- /dev/null
+ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDxQzSNojNRNVqjvgyj8GtVwozfsetxS5dznqQYNAmmdvEYDilbPBLjKqS3T6TYcBzaLyKZJnutSyuoshgA73gzwA8qyYt8jmnphydtYuHOdjyahnACzfaS4HLwl8KOGsZG68r9/I9I5wHytDd4T1qRH89bgD7yjMpJoY4cOPymrffpZuubTaNT9lIiH1hRmPp4jQSA47sl2/mVfswphBCAQNu+vHIbKgtvsayRwe8dS56inVDTPgg8Y5f6oyVUMGkN2c/GhlsWtnWnWqaskHbokj5b9Bv/CGl+8vQ+ureL3uDJF/e2zMiICJd2MLbgzl7Mah87u+mEIDiiPd3ECCaf ubuntu@teuthology