Foodx-devops-tools

* fix template context path generation to acquire all necessary paths

* fix missing client prefix on resource group name

* deployments.yaml gitrref pattern filtering to enable selecting deployment subscriptions per branch/tag
* mandatory resource_group specification
* mandatory unique application step names

* includes deep merge of user define context data

* deployment subscription references have surjective map to subscriptions defined in subscriptions.yml
* subscription references elsewhere (eg puff_map, service_principals, static_secrets) have injective map to subscriptions.yml