Add ability to manage fallback network config on PhotonOS (#941)

Currently cloud-init generates fallback network config on various
scenarios.

For example:
1. When no DS found
2. There is no 'network' info given in DS metadata.
3. If a DS gives a network config once and upon reboot if DS doesn't
   give any network info, previously set network data will be
   overridden.

A newly introduced key in cloud.cfg.tmpl can be used to control this
behavior on PhotonOS.

Also, if OS comes with a set of default network files(configs), like in
PhotonOS, cloud-init should not overwrite them by default.

This change also includes some nitpicking changes of reorganizing few
config variables.

Signed-off-by: Shreenidhi Shedi <sshedi@vmware.com>

0 files changed, 0 insertions, 0 deletions