This is a research study to find out if giving a drug called olaparib with a Luteinizing hormone- releasing hormone (LHRH) agonist (medication that suppresses testosterone) before you undergo a radical prostatectomy (surgery to remove your prostate) decreases the amount of cancer present at the time of surgery and decrease the risk of the disease coming back after surgery. You will receive one of the LHRH agonist: leuprolide, triptorelin or goserelin. Olaparib, leuprolide, triptorelin and goserelin is FDA approved for several types of cancers such as certain types of ovarian, breast,...