Remove deprecation warnings from Ansible 2.0.1.0

tasks/configure.yml

@@ -17,5 +17,5 @@
   shell: COMPOSER_HOME={{ composer_home_path|default('~/.composer') }}
          composer global require {{ item.key }}:{{ item.value }} --no-progress
          creates={{ composer_home_path|default('~/.composer') }}/vendor/{{ item.key }}
-  with_dict: composer_global_packages
+  with_dict: '{{ composer_global_packages }}'
   when: composer_global_packages|length > 0