inflight callbacks + tests
OEP-16578 cleanup list item renderLabel for vulnerabilities
Revert "OEP-16578 cleanup list item renderLabel for vulnerabilities" - escapeHTML property handles this inside normal render() method; changing renderLabel causes double-encodings with &amp; in them.
OEP-17783 safety-check on dragSource datatype as being a function (and not undefined), plus replacing console.error with SC.Logger.error for consistency.
basic mock lib
OEP-18729 - removed unused locale