put virtualenv activation during build in comment. That means that for the moment the build machine must be provisionned beforehand, or ansible must be available globally
---
.travis.yml:
forge_password: "ASTRdmLjJNa1NvHy2LRGvmvUeth6W3Fh/alYWvcvI8nDDsdkweHk0iXhcXZwtMQReb0NI5vJiRNXNy7a3XySC4+SP3hfHuDU58H2FqC4Ff0EHRPRHTEiXf7xmN53RxXYXZQvrFfqUb6tIsBNVKVmsYWNe01k8NVKPyYDfQB75PQ="