ConfigDrive: fix writing of 'injected' files and legacy networking

Previous commit inadvertently disabled the consumption of 'injected' files
in configdrive (openstack server boot --file=/target/file=local-file)
unless the datasource was in 'pass' mode. The default mode is 'net' so
that was not likely to happen.

Also here are:
a.) some comments to apply_network_config

b.) add backwards compatibility for distros that do not yet implement
    apply_network_config by converting the network config into ENI format
    and calling apply_network.

    This is required because prior to the previous commit, those distros
    would have had 'apply_network' called with the openstack provided
    ENI file. But after this change they will have apply_network_config
    called by cloudinit's main.

c.) add network_state_to_eni for converting net config to eni
    it supports the not-actually-correct 'hwaddress' field in ENI

LP: #1602373

0 files changed, 0 insertions, 0 deletions