Entity creation, simplify error handling, format and lint code

[soad003]

The current version of the code does not create any new entities in maltego if tags are available for the requested address. This is because the triple returned by get_address_details and get_entity_details was not handled properly (see https://github.com/INTERPOL-Innovation-Centre/GraphSense-Maltego-transform/blob/d3adadcce611b94c0f79969fc2117fbe281e4f9f/api/utils.py#L91 and for example https://github.com/INTERPOL-Innovation-Centre/GraphSense-Maltego-transform/blob/d3adadcce611b94c0f79969fc2117fbe281e4f9f/transforms/ToTags.py#L45-L54).

Whenever tags where available the error handling code simply printed a Maltego UI Msg but did not add the properties to the Maltego entity.

This PR should fix this issue. I also simplified the error handling code a bit, to avoid duplication.

Hope this helps.