Reuse reclass-system shared configuration model used for salt formulas

[epcim]

Salt formulas have shared configuration model where apps have reasonable defaults.
Salt managed helms, should be configured with the same pillars. The formula should support to reach these salt pillar data to configure values in Charts.

Relates to

• default values
• templates

Shared configuration model:
https://github.com/Mirantis/reclass-system-salt-model

The values to be configured by defaults from shared configuration model:
https://github.com/Mirantis/k8s-apps/blob/master/charts/elasticsearch/values.yaml

Reasonings

• we duplicate the effort
• loosing existing knowledge and best practice