Merge "replace baremetal_nic with api_interface"

ansible/roles/baremetal/defaults/main.yml

 ---
-baremetal_nic: "{{ api_interface | default('em1') }}"
-
 docker_apt_url: "https://apt.dockerproject.org"
 docker_apt_key_id: F76221572C52609D
 

ansible/roles/baremetal/tasks/append_to_etc_hosts.yml

@@ -5,7 +5,7 @@
   delegate_to: "{{ control_node }}"
 
 - name: get real node ip
-  shell: ip -4 addr show "{{ hostvars[control_node]['baremetal_nic'] }}" | grep -oP "(?<=inet )[\d\.]+(?=/)"
+  shell: ip -4 addr show "{{ hostvars[control_node]['api_interface'] }}" | grep -oP "(?<=inet )[\d\.]+(?=/)"
   register: real_node_ip
   delegate_to: "{{ control_node }}"