fixes #9369 - tftp should send host, not self to get the boot files uri

fixes #9362 - Add mediapath support to CoreOS

fixes #9274 - hostgroup#clone clones config groups

fixes #9249 - associated_host fixed for all compute resources

Fixes #9186 - build interface if needed during facts import

fixes #9124 - fixes detection of hashed root passwords

A root password that started with "$" would not be hashed, and therefore
would end up being stored in clear text and inserted in clear text to the
/etc/shadow file, which just won't work. This adds a bit more to the match...

Fixes #9104 - allow disabling of interface updates

fixes #8565 - only get unique, unused message/source IDs to speed up expiry

Fixes #6884 - Installation media without $minor generate broken $version

$version is generated with the major version and a dot, producing paths
like foo.bar/x64/7. which don't exist. For CentOS at least we want to generate
a path without the dot. The default values for these media have been changed too.

Fixes #9160 - use provision interface for image based provisioning