Extend timeout to cope with systems under load

Extending the Ansible and rebuild timeouts in order to better cope
with systems under load, primarily in virtual testing environments.

Change-Id: I258ab59c8fd7b2acbede43c71c1d5c7184b93c91

ansible.cfg

@@ -1,3 +1,3 @@
 [defaults]
-timeout = 120
+timeout = 300
 pipelining = True

playbooks/rebuild.yml

@@ -18,6 +18,8 @@
     instance_id: "{{ instance_id }}"
     image_id: "{{ rebuild_image_id }}"
     preserve_ephemeral: true
+    wait: "yes"
+    wait_for: 900
   delegate_to: localhost
   when: instance_image_id != rebuild_image_id and force_rebuild is not defined
 - name: "Call nova_rebuild if rebuild is mandated"
@@ -25,5 +27,7 @@
     instance_id: "{{ instance_id }}"
     image_id: "{{ rebuild_image_id }}"
     preserve_ephemeral: true
+    wait: "yes"
+    wait_for: 900
   delegate_to: localhost
   when: force_rebuild is defined