Fix check for etcd being downloaded (#102)

The previous check for whether etcd had been downloaded was slightly
off. This change uses the proper registration state check.

Signed-off-by: Craig Tracey <craigtracey@gmail.com>

ansible/roles/etcd/tasks/main.yml

@@ -5,7 +5,7 @@
     src: "{{ etcd_release_url }}"
     dest: /tmp
     creates: /usr/local/bin/etcd
-  register: etcd_download
+  register: etcd_downloaded
 
 - name: move binaries into path
   copy:
@@ -15,7 +15,7 @@
   with_items:
     - etcd
     - etcdctl
-  when: etcd_download.skipped == False
+  when: etcd_downloaded is changed
 
 - name: set permissions on etcd binaries
   file: