Fixes #18345 - Improve templates error handling

fixes #18735 - truncate encryption key to match preferred length (#4350)

Ruby 2.4's OpenSSL bindings raise an ArgumentError during encryption if
the key length exceeds the cipher's configured length (32 bytes with the
default cipher), but the verification hash algorithm still uses the full...

Fixes #18581 - conditionalize SUSE mediapath

fixes #17533 - provision dhcp for bond child macs

Fixes #18227 - clean up variables after rendering

Fixes #18205 - Add save_to_file macro

Fixes #18213 - Added webpack folder to string extraction

Refs #18143 - extend snippet_if_exists too

Fixes #18143 - enable variables for snippets (#4205)

Fixes #17330 - skip admin email if it's unknown

When admin user is being seeded the Setting might not exist at that
moment. We can't just create it with value, since the setting would
be invalid because of other attributes. Therefore we split settings
creation from the setting list so we could create it from seed too....