Fix Ansible 2.3.0.0 deprecation bug

tasks/install.yml

@@ -211,7 +211,7 @@
   shell: drush @{{ inventory_hostname }}{{ drushSubkey }} status
   register: drush_status
   changed_when: false
-  when: "'@{{ inventory_hostname }}{{ drushSubkey }}' in drush_aliases.stdout_lines"
+  when: "['@', inventory_hostname, drushSubkey]|join('') in drush_aliases.stdout_lines"
   tags: 'deploy'
 
 - name: "Run Post Deploy Tasks"