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

GraphSense-Maltego-transform/api/utils.py

Line 91 in d3adadc

return address_obj, tags, error

and for example

GraphSense-Maltego-transform/transforms/ToTags.py

Lines 45 to 54 in d3adadc

	results = get_address_details(currency,address)
	else:#i.e. for clusters
	results = get_entity_details(currency,address)
	if results[1] :
	if "504 Bad Gateway" in results[1]:# the Graphsense server is missing a </hr> in its HTTP504 response page which bugs Maltego hence the below. handling...
	responseMaltego.addUIMessage("\nThere was a Graphsense server 504 Bad Gateway response running the query " + query_type + " for " + currency + "\n",UIM_INFORM)
	if "(404)" in results[1]:
	responseMaltego.addUIMessage("\nNothing found in " + currency + " for : " + str(address) + "\n",UIM_INFORM)
	else:
	responseMaltego.addUIMessage(results[1],UIM_INFORM)

).

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.

[soad003]

@grabervi any comments?