Improve logging message structure

[ionut-arm]

Currently our log messages specify the error that occurred, however it would be useful to also include the location in code.
Example:
Currently: "Failed to read request; status: {}"
Enhanced: "FrontEndHandler handle_request: Failed to read request; status: {}"

Alternatively, when implementing actual logging, this might be sorted out for us by the logging framework (?)

[hug-dev]

env_logger put in the code at #48 has the following output:

[2019-10-18T15:39:51Z INFO  parsec::providers::mbed_provider] Mbed Provider - Destroy Key

Is that what you had in mind?

[ionut-arm]

env_logger put in the code at #48 has the following output:

[2019-10-18T15:39:51Z INFO  parsec::providers::mbed_provider] Mbed Provider - Destroy Key

Is that what you had in mind?

Yes! Though I'm not sure it'd be that helpful to admins, but better than nothing