Previously, each of the four derived config schema files had to be
regenerated using a separate maintenance script. This change simplifies
regeneration by combining all for scripts into a single command that can
be used to regenerate all relevant files after changing
MainConfigSchema.
Change-Id: I7d38d8a4aede60475c4bdd0053d2e10e298b9843
Instead of maintaining the config schema as a yaml file, we
maintain it as a set of constants in a class. From the information in
these constants, we can generate a JSON schema (yaml) file, and an
php file containing optimized arrays for fast loading.
Advantages:
- PHP doc available to IDEs. The generated markdown file is no longer
needed.
- Can use PHP constants when defining default values.
NOTE: needs backport to 1.38
Change-Id: I663c08b8a200644cbe7e5f65c20f1592a4f3974d
