test: Test handling of all types of publishes
test: Test handling of all types of publishes

Adds a test case for how publishes are sent to the Cloud.

Signed-off-by: Ben Astell <ded3fae2663d1648fc922f7692e7914ea175e4a7@windriver.com>

rcwoolley/device-cloud-python,rcwoolley/device-cloud-python