Initial tests for the rest v2 refactor

testing the annotations and the data format validation

.travis.yml

@@ -14,6 +14,3 @@ script:
   - set -eo pipefail
   - flake8 server/app/
   - pytest -s server/test/test_filter.py server/test/test_scanpy_engine.py
-  - cellxgene scanpy example-dataset/ &
-  - for i in {1..90}; do if http :5005/api/v0.1/initialize > /dev/null; then break; else echo "Waiting for server..."; sleep 1; fi; done
-  - pytest server/test/test_api.py