Adopt the mda.IdentifiableBeanPostProcessor parent template bean.
Remove the 09 branch specific default-validator. This was only needed to support the package name change of the IdentifiableBeanPostProcessor between the 0.10 and 0.9 mda-validator and upstream MDA versions. That is, validators/overlays/all/ contained the package name appropriate to the 0.10 MDA version, and because the IdentifiableBeanPostProcessor package name was different in 0.9 we needed a specific 0.9 validator override with a different package name. We no longer need this because both branches just reference a parent template bean which is defined correctly for their version in both the upstream mda-validator and MDA projects.
See https://github.com/iay/md-validator/issues/36