var to ref git sha1 or version info in becep

**Is your feature request related to a problem? Please describe.**
A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]

```
var ver = deployment().properties.cvsver

resource xxx xxx = {
name: '{xxx$ver}
}
```

**Describe the solution you'd like**
A clear and concise description of what you want to happen.

add version info into ` deployment()` or some other build time/runtime obj

Start by tracing the existing deployment() entry point and how resource declarations resolve interpolated values such as {xxx$ver}. Determine where build-time or runtime version information could be exposed, then verify that a Git SHA1 or version can be used in a resource name as requested.

Written by the indexing model from the issue text.