Pin rabbitmq tests to pika < 1.0.0 to fix tests.

Tests are failing with the release of pika 1.0.0.

test/integration/targets/rabbitmq_lookup/tasks/ubuntu.yml

@@ -10,7 +10,7 @@
 
 - name: Install pika and requests
   pip:
-    name: pika,requests
+    name: pika<1.0.0,requests
     state: latest
 
 - name: Test that giving an incorrect amqp protocol in URL will error

test/integration/targets/rabbitmq_publish/tasks/ubuntu.yml

@@ -1,6 +1,6 @@
 - name: Install requests and pika
   pip:
-    name: requests,pika
+    name: requests,pika<1.0.0
     state: present
 
 - name: RabbitMQ basic publish test