[NET-562] Persistent Keep Alive from node to host

[gabrielseibel1]

Describe your changes

Move PKA from node to host level

Provide testing steps

Described in ticket

[Aceix]

Will definitely need a UI change as well

[mattkasun]

when a server is updated to this version; how are the host and node models updated. The new node model will just ignore the keepalive in the database, but how will the host.Keepalive value be set?

[gabrielseibel1]

when a server is updated to this version; how are the host and node models updated. The new node model will just ignore the keepalive in the database, but how will the host.Keepalive value be set?

@mattkasun I've implemented logic for that in f67bff1 (f67bff1#diff-24c3832e2410ce37a7dfb88d3b4bf45a0506ce708774402fecddb5e96f9ff8d8R169) and in 10c3416, is that sufficient for your concern?

[mattkasun]

when a server is updated to this version; how are the host and node models updated. The new node model will just ignore the keepalive in the database, but how will the host.Keepalive value be set?

@mattkasun I've implemented logic for that in f67bff1 (f67bff1#diff-24c3832e2410ce37a7dfb88d3b4bf45a0506ce708774402fecddb5e96f9ff8d8R169) and in 10c3416, is that sufficient for your concern?

Migrate is only called on update from v0.17.1

[abhishek9686]

@gabrielseibel1 resolve conflicts