fixup! tests: move tests execution from setup.py to tox

7 jobs for tox in 9 minutes and 16 seconds (queued for 1 second)
Status Job ID Name Coverage
  Test
passed #498827
blackbox_mock_mqtt

00:02:43

passed #498828
blackbox_openwrt_mqtt

00:09:15

passed #498829
blackbox_openwrt_ubus

00:08:57

passed #498826
blackbox_openwrt_unix_socket

00:08:46

passed #498824
flake8

00:01:00

passed #498830
sample_module

00:01:57

passed #498825
unit_tests

00:02:17