Refactor bpmn_validation_success.js

[redfave]

The generated file bpmn_validation_success.js contains an array noIssuesElements with issues Elements containing the rule name and a success classification.

Example: { "id": "2b9382eb90e2aa912851b1186ca2fbe9", "bpmnFile": "src/main/resources/diagram_2.bpmn", "ruleName": "XorConventionChecker", "elementId": "", "elementName": "", "classification": "SUCCESS", "paths": [], "message": "No issues found" }

This is a misusage of the issue data structure and is misleading as the intention is actually to show that a certain checker hasn't found any errors.