Merge pull request #78 from PrivateAIM/hub-0.8.19

Update tested hub version to 0.8.19

Author: pbrassel

.env.test

@@ -7,4 +7,4 @@ PYTEST_ADMIN_PASSWORD=start123
 PYTEST_DEFAULT_MASTER_IMAGE=python/base
 PYTEST_ASYNC_MAX_RETRIES=5
 PYTEST_ASYNC_RETRY_DELAY_MILLIS=500
-PYTEST_HUB_VERSION=0.8.17
+PYTEST_HUB_VERSION=0.8.19