Updated task to use first found mac address when multiple networks ar…

…e involved

This commit needs to be revisited when there are multiple external networks are
attached to the virtual machines.

linchpin/provision/roles/libvirt/tasks/provision_libvirt_node.yml

@@ -343,9 +343,10 @@
     loop_var: node
   register: extract_mac_address_result
 
+# needs to be updated when multiple external addresses are involved
 - name: "mac_and_ip | wait up to 5 mins for dhcp ip address"
   shell: |
-    /usr/sbin/arp -an | grep -F {{ extract_mac_address_result.results[mac].stdout }} | cut -f 2 -d "(" | cut -f 1 -d ")"
+    /usr/sbin/arp -an | grep -F {{ extract_mac_address_result.results[mac].stdout_lines[0] }} | cut -f 2 -d "(" | cut -f 1 -d ")"
   with_items:
     - "{{ res_count.stdout }}"
   loop_control:
@@ -356,9 +357,10 @@
   delay: 10
   when: uri_hostname == 'localhost'
 
+# Note: The task needs to be updated when multiple external addresses are involved 
 - name: "mac_and_ip | wait up to 5 mins for dhcp ip address"
   shell: |
-    /usr/sbin/arp -an | grep -F {{ extract_mac_address_result.results[mac].stdout }} | cut -f 2 -d "(" | cut -f 1 -d ")"
+    /usr/sbin/arp -an | grep -F {{ extract_mac_address_result.results[mac].stdout_lines[0] }} | cut -f 2 -d "(" | cut -f 1 -d ")"
   with_items:
     - "{{ res_count.stdout }}"
   loop_control: