Rucaparib Recruiting Phase 1 / 2 Trials for Pancreatic Adenocarcinoma Metastatic / PALB2 Gene Mutation / Homologous Recombination Deficiency / Biliary System Disorder / Adenocarcinomas of the Gastroesophageal Junction / Stage IVA Colorectal Cancer AJCC v7 / Stage IV Pancreatic Cancer AJCC v6 and v7 / brca2 Gene Mutation / Stage IVB Colorectal Cancer AJCC v7 / BRCA1 Gene Mutation / Stage IV Colorectal Cancer AJCC v7 Treatment