CoxPH concordance missing in both Flow and in R/Py CoxPH summary

1. When displaying Cox PH model in Flow concordance never appears in any Output section.
2. When using `summary(coxph.model)` in R (where `coxph.model` is H2O CoxPH model) then concordance is not included , while the same on R CoxPH model does include concordance:
R:

H2O R:

Py lifelines summary output: https://lifelines.readthedocs.io/en/latest/Survival Regression.html#fitting-the-regression

H2O Py:

tested on `master` branch build