add ansible plugin and templates

controller/Orchestrator.py

icgparser/ModelParser.py

input_file_generated/ir.json

output_file_example/nginx_openstack/ansible/inventory.j2

output_file_example/nginx_openstack/ansible/nginx.yaml

output_files_generated/nginx_openstack/config.yaml

output_files_generated/nginx_openstack/terraform/main.tf

plugin/AnsiblePlugin.py

plugin/PluginException.py

template-location.properties

templates/ansible/ubuntu/config.tpl

templates/ansible/ubuntu/inventory.tpl

templates/ansible/ubuntu/nginx.tpl