[ANSIBLE] Generate helm values file for kube-prometheus stack

Default values file is provided and any of it's contents can be
overriden by setting relevant keys in 'kube_prometheus_helm_values'
dict on provisioner run time.

Change-Id: I1655d64704e1ad6e9cd9650622ae1a92de902a8f
Issue-ID: INT-1926
Signed-off-by: Bartek Grzybowski <b.grzybowski@partner.samsung.com>
2 files changed