ciao-down: Fix file sharing and hosts file
ciao-down: Fix file sharing and hosts file

This PR fixes two small bugs in the cloud-init template:

- The /etc/hosts file was being updated on each boot instead of just the
  first boot.
- The mount parameters for the P9 FS were incorrect, leading to occassional
  mount failures, often on the first boot.

Signed-off-by: Mark Ryan <f16215f7acd0bd7fdc465539215bd574c785b062@intel.com>

obedmr/ciao,mcastelino/ciao,mrkz/ciao,erick0z/ciao,obedmr/ciao,rbradford/ciao,wcwxyz/ciao,wcwxyz/ciao,mcastelino/ciao,mrkz/ciao,tpepper/ciao,wcwxyz/ciao,01org/ciao,01org/ciao,matthewrsj/ciao,ciao-project/ciao,markdryan/ciao,mrkz/ciao,erick0z/ciao,rbradford/ciao,matthewrsj/ciao,tpepper/ciao,mcastelino/ciao,kaccardi/ciao,kaccardi/ciao,erick0z/ciao,markdryan/ciao,matthewrsj/ciao,tpepper/ciao,ciao-project/ciao,obedmr/ciao