Graph Update: pip in /circleci/images/citusupgradetester/files/etc, /circleci/images/failtester/files/etc, /circleci/images/pgupgradetester/files/etc, /circleci/images/stylechecker/files/etc #1506357207

Graph Update: pip in /circleci/images/citusupgradetester/files/etc, /circleci/images/failtester/files/etc, /circleci/images/pgupgradetester/files/etc, /circleci/images/stylechecker/files/etc #1506357207 #4