credentials: Workaround krb5_cc_remove_cred not implemented in MIT kerberos

Signed-off-by: Samuel Cabrero <scabrero@suse.de>
29 jobs for scabrero-mit-chgdcpass in 132 minutes and 39 seconds (queued for 7 seconds)
Status Job ID Name Coverage
  Build
passed #202423560
docker shared
ctdb

00:37:55

passed #202423571
docker shared
debian9-samba-o3

00:31:26

passed #202423572
docker shared
opensuse150-samba-o3

00:38:58

passed #202423541
docker shared
others

00:11:56

passed #202423543
docker shared
samba

00:23:29

passed #202423564
docker private samba-ci-private
samba-ad-dc-1

00:34:02

passed #202423550
docker shared
samba-ad-dc-2

00:48:57

passed #202423551
docker shared
samba-ad-dc-3

00:38:02

passed #202423552
docker shared
samba-ad-dc-4

00:43:18

passed #202423554
docker shared
samba-ad-dc-5

00:38:06

passed #202492097
shared docker
samba-ad-dc-6

00:35:54

passed #202423556
docker shared
samba-ad-dc-backup

00:41:49

passed #202423562
docker shared
samba-ad-dc-ntvfs

00:38:45

passed #202423549
docker shared
samba-ad-member

00:26:40

passed #202423561
docker shared
samba-ctdb

00:21:40

passed #202423563
docker private samba-ci-private
samba-fileserver

00:24:59

passed #202423558
docker shared
samba-libs

00:35:25

passed #202423544
docker shared
samba-none-env

00:49:24

passed #202423545
docker shared
samba-nopython

00:33:10

passed #202423546
docker shared
samba-nopython-py2

00:44:15

passed #202423565
docker private samba-ci-private
samba-nt4

00:42:19

passed #202423566
docker private samba-ci-private
samba-schemaupgrade

00:21:06

passed #202423559
docker shared
samba-static

00:46:54

passed #202423547
docker shared
samba-systemkrb5

00:16:45

passed #202423548
docker shared
samba-xc

00:05:24

passed #202423570
docker shared
ubuntu1404-samba-o3

00:32:17

passed #202423569
docker shared
ubuntu1604-samba-o3

00:32:01

passed #202423568
docker shared
ubuntu1804-samba-o3

00:32:32

failed #202423555
docker shared
samba-ad-dc-6

00:35:53