Fix references to WebDriver spec and CDDL cross-references (#671)

* Fix references to WebDriver spec and CDDL cross-references

Both WebDriver and Infra define "success" and "error" so disambiguation
is required. Bikeshed now also supports more cross-referencing for CDDL
definitions so these are used where appropriate to reduce the number of
warnings emitted.

* Fix table formatting in scanning.bs

* Revert unnecessary change

Author: reillyeon