EQUITY ALERT: Rosen Law Firm Announces Filing of Securities Class Action Lawsuit Against Certain Officers and Directors of Quadrant 4 System Corp. – QFOR NEW YORK, July 28, 2017 (GLOBE NEWSWIRE) -- Rosen Law Firm, a global investor rights law firm, announces the filing of a class action lawsuit on behalf of purchasers of the securities of Quadrant 4...