POL1-884: GWS indirect counters polling for Nokia

brian_polling_manager/interface_stats/cli.py

brian_polling_manager/interface_stats/common.py

brian_polling_manager/interface_stats/config-example.json

brian_polling_manager/interface_stats/config.py

brian_polling_manager/interface_stats/juniper.py

brian_polling_manager/interface_stats/nokia.py

brian_polling_manager/interface_stats/vendors/__init__.py

brian_polling_manager/inventory.py

test/interface_stats/conftest.py

test/interface_stats/data/capture-test-data-nokia.py

test/interface_stats/data/capture-test-data.py

test/interface_stats/data/nokia-interfaces.json

...face_stats/data/rt0.ams.nl.lab.office.geant.net-state.xml

test/interface_stats/test_interface_stats.py

test/interface_stats/test_interface_stats_e2e.py

test/interface_stats/test_juniper.py

test/interface_stats/test_nokia.py

tox.ini