stackl dynamic ansible inventory groups

[GBrawl]

Description of feature

support groups in the ansible inventory

[GBrawl]

example:

  stackl_inventory_groups:
    - tags: ["master"]
      description: “3 host will be in master and all hosts will be nodes
      count: 3 
    - tags: ["etcd"]
      description: “2 host will be in etcd and all hosts will be nodes
      count: 2