Fix Kerberos in session upgrade (#2010)

4 jobs for 2010-upgradesession-kerberos in 16 minutes and 34 seconds (queued for 2 seconds)
latest
Status Job ID Name Coverage
  Build
passed #20119
build_bionic

00:04:37

passed #20118
build_buster

00:03:38

passed #20120
build_centos_7

00:05:12

passed #20117
build_stretch

00:03:06