Remove deprecation warnings from Ansible 2.0.1.0

tasks/ec2/inithost.yml

@@ -31,7 +31,7 @@
     hostname="{{ host }}"
     static_ipv4="{{ item.public_ip }}"
     groups="{{ initgroups }}"
-  with_items: ec2.instances
+  with_items: '{{ ec2.instances }}'
 
 - name: "Waiting for SSH service becoming available"
   wait_for:
@@ -40,4 +40,4 @@
     delay=10
     timeout=120
     state=present
-  with_items: ec2.instances
+  with_items: '{{ ec2.instances }}'