[backend] Remove syserr field, use logger instead; Prefer logger.error() as...

[backend] Remove syserr field, use logger instead; Prefer logger.error() as way to contact sysadmins than directly e-mailing
2 jobs for issue_430 in 31 minutes and 23 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Test
passed #3375
lidiap2015
py27-linux

00:16:16

passed #3376
beat-macosx
py27-macosx

00:15:07