fix testing errors

- the checkprivate function in the dnssec test set ret=0, erasing
  results from previous tests and making the test appear to have passed
  when it shouldn't have
- checkprivate needed a delay loop to ensure there was time for all
  private signing records to be updated before the test
41 jobs for !1330 with each-fix-dnssec-test-error in 17 minutes and 36 seconds (queued for 4 seconds)
detached
Status Job ID Name Coverage
  Precheck
passed 🐞:sid:amd64:precheck #148463
amd64 docker linux

00:00:40

passed sid:amd64:precheck #148462
amd64 docker linux

00:00:40

 
  Build
passed asan:sid:amd64:build #148470
amd64 docker linux

00:01:16

passed bionic:amd64:build #148476
amd64 docker linux

00:01:38

passed centos6:amd64:build #148464
amd64 docker linux

00:01:46

passed centos7:amd64:build #148465
amd64 docker linux

00:01:45

passed clang:stretch:amd64:build #148466
amd64 docker linux

00:02:36

passed clang:stretch:i386:build #148471
i386 docker linux

00:01:18

passed jessie:amd64:build #148467
amd64 docker linux

00:01:25

passed noassert:sid:amd64:build #148474
amd64 docker linux

00:02:27

passed pkcs11:sid:amd64:build #148473
amd64 docker linux

00:01:07

passed sid:amd64:build #148469
amd64 docker linux

00:02:15

passed sid:i386:build #148472
i386 docker linux

00:01:23

passed stretch:amd64:build #148468
amd64 docker linux

00:01:12

passed xenial:amd64:build #148475
amd64 docker linux

00:02:41

 
  Test
passed docs:sid:amd64 #148477
amd64 docker linux

00:01:13

passed install:sid:amd64 #148493
amd64 docker linux

00:01:44

passed noassert:system:sid:amd64 #148497
amd64 docker linux

00:06:02

passed noassert:unit:sid:amd64 #148496
amd64 docker linux

00:00:43

passed pkcs11:system:sid:amd64 #148495
amd64 docker linux

00:07:37

passed pkcs11:unit:sid:amd64 #148494
amd64 docker linux

00:00:45

passed system:asan:sid:amd64 #148491
amd64 docker linux

00:08:03

passed system:bionic:amd64 #148501
amd64 docker linux

00:06:06

passed system:centos6:amd64 #148486
amd64 docker linux

00:06:31

passed system:centos7:amd64 #148487
amd64 docker linux

00:06:31

passed system:jessie:amd64 #148488
amd64 docker linux

00:06:50

passed system:sid:amd64 #148502
linux docker amd64

00:06:43

passed system:sid:i386 #148492
i386 docker linux

00:07:08

passed system:stretch:amd64 #148489
amd64 docker linux

00:07:07

passed system:xenial:amd64 #148499
amd64 docker linux

00:07:33

passed unit:asan:sid:amd64 #148483
amd64 docker linux

00:00:55

passed unit:bionic:amd64 #148500
amd64 docker linux

00:00:53

passed unit:centos6:amd64 #148478
amd64 docker linux

00:00:52

passed unit:centos7:amd64 #148479
amd64 docker linux

00:00:53

passed unit:clang:stretch:amd64 #148484
amd64 docker linux

00:00:50

passed unit:jessie:amd64 #148480
amd64 docker linux

00:00:34

passed unit:sid:amd64 #148482
amd64 docker linux

00:00:43

passed unit:sid:i386 #148485
i386 docker linux

00:00:50

passed unit:stretch:amd64 #148481
amd64 docker linux

00:00:50

passed unit:xenial:amd64 #148498
amd64 docker linux

00:00:55

failed system:sid:amd64 #148490
amd64 docker linux

00:07:25