Prevent a race in the "inline" system test

A short time window exists between logging the addition of an NSEC3PARAM
record to a zone and committing it to the current version of the zone
database.  If a query arrives during such a time window, an unsigned
response will be returned.  One of the checks in the "inline" system
test requires NSEC3 records to be present in an answer - that check
would fail in the case described above.  Use rndc instead of log
watching for checking whether zone signing and NSEC3 chain modifications
are complete in order to prevent intermittent "inline" system test
failures.
27 jobs for 491-prevent-a-race-in-the-inline-system-test in 14 minutes and 12 seconds (queued for 4 seconds)
Status Job ID Name Coverage
  Precheck
passed precheck:debian:sid:amd64 #44802
amd64 docker linux

00:00:19

 
  Build
passed build:centos:centos6:amd64 #44803
amd64 docker linux

00:03:14

passed build:centos:centos7:amd64 #44804
amd64 docker linux

00:03:23

passed build:clang:debian:stretch:amd64 #44805
amd64 docker linux

00:02:34

passed build:clang:debian:stretch:i386 #44809
i386 docker linux

00:02:55

passed build:debian:jessie:amd64 #44806
amd64 docker linux

00:02:54

passed build:debian:sid:amd64 #44808
amd64 docker linux

00:02:29

passed build:debian:sid:i386 #44810
i386 docker linux

00:01:36

passed build:debian:stretch:amd64 #44807
amd64 docker linux

00:02:31

passed pkcs11:build:debian:sid:amd64 #44811
amd64 docker linux

00:02:32

 
  Test
passed install:debian:sid:amd64 #44825
amd64 docker linux

00:03:21

passed pkcs11:systemtest:debian:sid:amd64 #44827
amd64 docker linux

00:04:41

passed pkcs11:unittest:debian:sid:amd64 #44826
amd64 docker linux

00:00:53

passed systemtest:centos:centos6:amd64 #44819
amd64 docker linux

00:05:13

passed systemtest:centos:centos7:amd64 #44820
amd64 docker linux

00:05:16

passed systemtest:debian:jessie:amd64 #44821
amd64 docker linux

00:04:46

passed systemtest:debian:sid:amd64 #44856
linux docker amd64

00:04:37

passed systemtest:debian:sid:i386 #44824
i386 docker linux

00:04:48

passed systemtest:debian:stretch:amd64 #44822
amd64 docker linux

00:05:01

passed unittest:centos:centos6:amd64 #44812
amd64 docker linux

00:00:58

passed unittest:centos:centos7:amd64 #44813
amd64 docker linux

00:00:58

passed unittest:clang:debian:stretch:amd64 #44817
amd64 docker linux

00:00:44

passed unittest:debian:jessie:amd64 #44814
amd64 docker linux

00:00:51

passed unittest:debian:sid:amd64 #44816
amd64 docker linux

00:00:48

passed unittest:debian:sid:i386 #44818
i386 docker linux

00:00:47

passed unittest:debian:stretch:amd64 #44815
amd64 docker linux

00:00:52

failed systemtest:debian:sid:amd64 #44823
amd64 docker linux

00:05:16