update flower to make it work for redis with override vars

playbooks/roles/flower/defaults/main.yml

@@ -7,6 +7,7 @@ FLOWER_BROKER_HOST: "127.0.0.1"
 FLOWER_BROKER_PORT: 5672
 FLOWER_ADDRESS: "0.0.0.0"
 FLOWER_PORT: "5555"
+FLOWER_BROKER_TRANSPORT: 'amqp'
 
 FLOWER_OAUTH2_KEY: "A Client ID from Google's OAUTH2 provider"
 FLOWER_OAUTH2_SECRET: "A Client Secret from Google's OAUTH2 provider"
@@ -24,10 +25,11 @@ flower_venv_bin: "{{ flower_venv_dir }}/bin"
 
 flower_python_reqs:
   - "flower==0.8.3"
+  - "redis==2.10.6"
 
 flower_deploy_path: "{{ flower_venv_bin }}:/usr/local/sbin:/usr/local/bin:/usr/bin:/sbin:/bin"
 
-flower_broker: "amqp://{{ FLOWER_BROKER_USERNAME }}:{{ FLOWER_BROKER_PASSWORD }}@{{ FLOWER_BROKER_HOST }}:{{ FLOWER_BROKER_PORT }}"
+flower_broker: "{{ FLOWER_BROKER_TRANSPORT }}://{{ FLOWER_BROKER_USERNAME }}:{{ FLOWER_BROKER_PASSWORD }}@{{ FLOWER_BROKER_HOST }}:{{ FLOWER_BROKER_PORT }}"
 
 flower_environment:
   PATH: "{{ flower_deploy_path }}"