Classic confinement request for microstack

We’re developing an all-in-one OpenStack in a snap called microstack, which (at least initially) requires a lot of integration with the host system on a classic install.

The longer term objective is to make it fully confined but having classic confinement to start with would be helpful.

@reviewers, here’s your ping pong to take a look at this classic confinement request :slight_smile:

The requirements are understand and I’ve vetted the publisher. This is now live.

@jamespage - when you are ready to make this strict, please feel free to reach out if you need help from snapd.