OpBlockwiseObjectClassification: Cache prediction image in case requ are not block-aligned.
cluster: debug args
clusterOps: Support secondary datasets again.
cluster: debug args
object classification: Fix crash when headless but no batch cmd-line args (which happens when launching via cluster mechanism)
OpThresholdingTwoLevels: Don't use any cache inputs for non-cached outputs.
cluster: Remove FIXME assertion for secondary outputs.