merged develop onto branch

Changelog.md

docs/source/protocol/msr.rst

docs/source/protocol/poller.rst

install-sdist-to-test.py

inventory_provider/juniper.py

inventory_provider/routes/classifier.py

inventory_provider/routes/data.py

inventory_provider/routes/msr.py

inventory_provider/routes/poller.py

inventory_provider/routes/testing.py

inventory_provider/tasks/worker.py

test/conftest.py

test/data/junosspace-devices.xml

test/data/router-info.json

test/data/update_junosspace_devices.py

test/per_router/conftest.py

test/per_router/test_celery_worker.py

test/per_router/test_data_routes.py

test/per_router/test_juniper_data.py

test/per_router/test_poller_routes.py