Changes in Telemetry Backend.

my_deploy.sh

src/telemetry/backend/drivers/emulated/EmulatedDriver.py

...try/backend/drivers/emulated/SyntheticMetricsGenerator.py

src/telemetry/backend/requirements.in

src/telemetry/backend/tests/messages_emulated.py

src/telemetry/backend/tests/test_emulated.py

src/telemetry/requirements.in