The schema generation was not generating the metadata properties
under the VolumeClaimTemplate type, resulting in the properties being
ignored by the api server. The preserve unknown fields tag was
not working recursively on the volumeClaimTemplates since the subtypes
were defined. Now we post-process the schema so we can preserve
the unknown fields for the volume claim templates metadata.
Signed-off-by: Travis Nielsen <tnielsen@redhat.com>