Fix xpath and parent in _get_nodes method
Set test values of credentials
Add test case "Delete one node from environment after successful deployment.Add new nodes and deploy."
Fix test according functionality: can not click offline node
Delete test case "Deploy without HA mode 1 controller 2 compute 1 offline compute"
Fix verify_amount method
Merge pull request #18 from Mirantis/fix_autotests

Fix autotests according neytiry test cases of Deployment BR