On a number of levels, “Coriolanus’’ is a shrewd recession-era, election-year choice by Commonwealth Shakespeare Company artistic director Steven Maler, who will direct the drama on Boston Common from July 25 to Aug. 12. While “Coriolanus’’ is fundamentally the tale of one unyielding man’s downfall, a disgust with the political process pervades the play. It reminds us, once again, that Shakespeare is not only timeless but ever-timely.