Document extra.image.isolated koji metadata
Document extra.image.isolated koji metadata

Signed-off-by: Luiz Carvalho <ce3f14872713a9ca19158c744f8de50732acf24f@redhat.com>

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