Remove compute RPC API version 1.x
Remove compute RPC API version 1.x

Now that we have RPC API versions 1.x and 2.0, we could choose to
continue to support version 1.x in Folsom and only remove it in
Grizzly.

This, in theory, would allow smoother upgrades of older Folsom
versions to the final Folsom version. However, in reality, we
most likely made DB schema changes which affect the compute service
and would prevent such a smooth upgrade anyway.

Removing 1.x support now removes a lot of potentially buggy backwards
compat code from the release and will also make backporting fixes from
Grizzly to Folsom easier.

Change-Id: Ic18017a16c5bffee85a43db65ff17283599a27ba

n0ano/gantt,n0ano/gantt