Remove resolv.conf after purging resolvconf

[oonska]

If there is an existing symlink to resolv.conf then the file.managed
state will fail. Here we resolve that by destroying the resolv.conf
file if we remove resolvconf.

[aboe76]

@oonska I understand the issue, but removing the symlink won't it render the system unusable?

[0xf10e]

Not if you replace it with a proper resolv.conf after removing the symlink but at a quick glance I can't see the PR taking care of that.

[oonska]

The next state 'resolv-file' will create the /etc/resolv.conf file after we remove the symlink in 'remove-symlink'.
The file removal and replacement only happens when we uninstall resolvconf.
As far as name resolution goes this will work provided that resolvconf is the only utility managing the resolv.conf file.

[aabouzaid]

I think a better way to do that is just adding:
- follow_symlinks: False

So no need to remove the symlink then create it, but it will be overwritten.
That what I did in resolver.ng formula to deal with that.