Python Docs: Add examples to CoxProportionalHazards

Description

Add examples for each CoxProportionalHazards parameter to the following file, following the format that is already in use.
h2o-3/h2o-bindings/bin/custom/python/coxph.py

Many options will be the same as GBM. For others, tests are available here:
https://github.com/h2oai/h2o-3/tree/master/h2o-py/tests/testdir_algos/coxph

Use
from h2o.estimators import H2OCoxProportionalHazardsEstimator

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hannah.tillman

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hannah.tillman

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Configure