don't need this variant
change thse KMeans tests to kmeans2/fvec
update node status if it becomes healthy again
Merge branch 'master' of https://github.com/0xdata/h2o
New scheme on master vecs's refcnts.

At the time a vec's refcnt +1 its master's refcnt also +1 without
deduplication. This simplies refcnt verification.
don't use h2o.__logIt before the sandbox is setup
change to match 'cluster_variances'/'error' change in KMeans2
seeing some center differences in benign.csv and prostate.csv
bug fixes
Merge branch 'master' of github.com:0xdata/h2o
Merge branch 'master' of github.com:0xdata/h2o
Not passing.
Fix case where number of histogram bins is 1.
Force binIdx to be 0.
This test is still completely nonfunctional.
But at least the code makes sense now.
Add withinss sanity check.
Rename to NOPASS.
Added --wipeall.
Some refactoring.