This exposes helm's force and recreate pods flags for upgrade and
rollback. It exposes in the chart manifest an options field underneath
the upgrade field to hold options to pass through to helm, and
initializes it with these two flags. Since rollback is currently a
standalone operation which does not consume manifests, these flags are
directly exposed as api and cli arguments there.
Change-Id: If65c1e97d437d9cf9d5838111fd485c80c76aa1d
ae690ef828