h2o.removeAll: Remove All Objects on the H2O Cluster
Description
Removes the data from the h2o cluster, but does not remove the local references.
Retains models, frames and vectors specified in retained_elements argument.
Retained elements must be instances/ids of models and frames only. For models retained, training and validation frames are retained as well.
Cross validation models of a retained model are NOT retained automatically, those must be specified explicitely.