Make OpenRMC spec compatible with tcg-pandoc.

This includes some minor spacing changes for code blocks to keep JSON on the rendered
page.

To build:

First clone [ocp-spec-tools](https://github.com/opencomputeproject/ocp-spec-tools/), and then run:

```
$ path/to/ocp-spec-tools/ocp-docker-pull.sh
$ path/to/ocp-spec-tools/ocp-docker-run.sh --pdf OpenRMC_UsageGuide_v1.2.pdf OpenRMC_UsageGuide_v1.2.ocp
```

The following metadata fields are not currently respected by ocp-spec-tools:

 - `supersedes`
 - `status`
 - `released`
 - `class`
 - `copyright`
 - `paragraph_numbering`

Signed-off-by: Jeff Andersen <jeffandersen@google.com>

Author: bluegate010