Set nova instance_build_timeout to 1h by default

This patch configures 1h build instance timeout, when it is reached
instance will be moved to ERROR state. This will prevent having
instances stuck in BUILD state.

The timeout might be changed via _param:nova_instance_build_timeout

Change-Id: Ic695b79e0095fdb5b47d8ad5233896ba678833f1
8 files changed