cannot do a "one liner" with Hyperspec before_mount method

this does not work:

`before(:all) { before_mount { .... } }`

the ast search mechanism in `Hyperstack::Internal::ClientExecution#find_block` thinks the outer block i.e. `{ before_mount ... }` is the block its looking for. This probably can only be solved heuristically by checking to see what the method is.

Work around is to say:

```ruby
before(:all) do
before_mount { ... }
end
```

change to documentation if its not an easy fix