Add missing descriptions and examples to schema
Add missing descriptions and examples to schema

* OSBS-5733

Signed-off-by: Athos Ribeiro <9cdfc39bfa10853bf9ad64090808d55fee7504ca@redhat.com>

projectatomic/atomic-reactor,DBuildService/atomic-reactor,fr34k8/atomic-reactor,fr34k8/atomic-reactor,projectatomic/atomic-reactor,DBuildService/atomic-reactor