check isort by travis

.travis.yml

changelog.d/3540.misc

synapse/config/consent_config.py

synapse/config/logger.py

synapse/config/server_notices_config.py

synapse/http/client.py

synapse/http/site.py

synapse/rest/__init__.py

synapse/rest/client/v1/admin.py

synapse/rest/client/v1/initial_sync.py

synapse/rest/client/v2_alpha/devices.py

synapse/rest/media/v1/identicon_resource.py

synapse/storage/schema/delta/48/group_unique_indexes.py

tox.ini