Add default implementation to the Start/Stop funcs instead of the users of them (#4701)
Add default implementation to the Start/Stop funcs instead of the users of them (#4701)

Signed-off-by: Bogdan Drutu <3f8e17047c2434e5c82a61403e56b9ef3e226d99@gmail.com>
open-telemetry/opentelemetry-collector,open-telemetry/opentelemetry-collector,open-telemetry/opentelemetry-collector