HIVE-8501 : Fix CBO to use indexes when GenericUDFBridge is applied (Pengcheng Xiong, reviewed by Sergey Shelukhin)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/branch-0.14@1633265 13f79535-47bb-0310-9956-ffa450edef68