During the implementation phase of the Provisioning Improvements specs
an error in the calculation formula of the merged spec was discovered,
so the patch used the formula from a previous revision of the spec
patch.
The implementation also diverged in not adding a new configuration
option but overloading the existing one to support the `auto` option.
This patch updates the Provisioning Improvements specs to match the
implementation from change id If30bb6276f58532c0f78ac268544a8804008770e
Change-Id: Id4b7aa252ad0404d3038a1279e0d673a0809c7e8
6dd5d605c1