[ci] updating circle.yml for the new docker container; enabling integration tests again

Author: Emanuele Palazzetti

circle.yml

@@ -4,6 +4,7 @@ machine:
   environment:
     CASS_DRIVER_NO_EXTENSIONS: 1
     AGENT_BUILD_PATH: "/home/ubuntu/agent"
+    TEST_DATADOG_INTEGRATION: 1
   post:
     - pyenv global 2.7.11 3.4.4
 
@@ -17,7 +18,7 @@ dependencies:
     # TODO[manu]: remove this part when everything will be open source
     - git clone [email protected]:DataDog/raclette.git $AGENT_BUILD_PATH
     - cd $AGENT_BUILD_PATH && docker build -t datadog/trace-agent .
-    - docker run -d -p 127.0.0.1:7777:7777 datadog/trace-agent
+    - docker run -d -e DD_API_KEY=invalid_key_but_this_is_fine -e DD_BIND_HOST=0.0.0.0 -p 127.0.0.1:7777:7777 datadog/trace-agent
 
 test:
   override: