Fix for issues preventing cluster bootstrap

Small fixes found when adding support for drac cluster.

They are related to changes that happened after the last new cluster addition, so it's normal to catch them now while adding a new cluster.

mentioned in merge request !146 (merged)

added 1 commit

• 78d3b4ea - [lib][schema] Make kavlan hashes optional

Compare with previous version

mentioned in merge request !144 (closed)

assigned to @lnussbau

ok

added 5 commits

• 9167c721 - 1 commit from branch master
• 3a92983d - [lib] Don't fail on missing keys when bootstrapping a cluster
• 157202a5 - [input] Add unknown disk model to avoid failures during bootstrap
• 76ad3019 - [input_loader] Don't try to allocate IPv6 in kavlan if kavlan is disabled
• c32726a1 - [lib][schema] Make kavlan hashes optional

Compare with previous version

merged

mentioned in commit de16113a