vyatta-op: formatting changes for style consistency

Update scripts/vyatta-image-tools.pl to have consistent identation
levels and style throughout.
vyatta-op: fix for the config file copy via scp failure

Copying the config file (or any other for that matter via the CLI copy
command) to another host via scp fails due to the failure to create the
known_hosts file.

Bug #340 http://bugzilla.vyos.net/show_bug.cgi?id=340