Log attemptSave failures in UpdateRepoOnMoveJob

Change-Id: Icc82196aec93324247b40a146103d1a20db94522
(cherry picked from commit 37796c0386913116667cf69f8ebd954678c3c2f9)
Merge "Log attemptSave failures in UpdateRepoOnMoveJob" into mw1.24-wmf14