Make primary's transfer log more detailed

Added number of messages, amount of records, size in bytes and time taken per transfer to primary's transfer log. Added a test case to runtime system test to check on named's output for the records information after processing a dig AXFR query.
47 jobs for !1404 with 513-new-metrics-to-report-DNSSEC-signing-operations-and-IXFRs in 23 minutes and 37 seconds (queued for 4 seconds)
detached
Status Job ID Name Coverage
  Precheck
passed #162259
amd64 docker linux
🐞:sid:amd64:precheck

00:01:03

passed #162258
amd64 docker linux
sid:amd64:precheck

00:00:16

 
  Build
passed #162266
amd64 docker linux
asan:sid:amd64:build

00:01:29

passed #162272
amd64 docker linux
bionic:amd64:build

00:01:13

passed #162260
amd64 docker linux
centos6:amd64:build

00:01:40

passed #162261
amd64 docker linux
centos7:amd64:build

00:02:27

passed #162262
amd64 docker linux
clang:stretch:amd64:build

00:01:47

passed #162267
i386 docker linux
clang:stretch:i386:build

00:01:50

passed #162263
amd64 docker linux
jessie:amd64:build

00:01:00

passed #162270
amd64 docker linux
noassert:sid:amd64:build

00:01:19

passed #162269
amd64 docker linux
pkcs11:sid:amd64:build

00:01:44

passed #162265
amd64 docker linux
sid:amd64:build

00:01:25

passed #162268
i386 docker linux
sid:i386:build

00:01:17

passed #162264
amd64 docker linux
stretch:amd64:build

00:01:09

passed #162271
amd64 docker linux
xenial:amd64:build

00:01:59

 
  Test
passed #162273
amd64 docker linux
docs:sid:amd64

00:00:55

passed #162289
amd64 docker linux
install:sid:amd64

00:02:39

passed #162293
amd64 docker linux
noassert:system:sid:amd64

00:06:51

passed #162292
amd64 docker linux
noassert:unit:sid:amd64

00:00:47

passed #162304
linux docker amd64
pkcs11:system:sid:amd64

00:06:15

passed #162290
amd64 docker linux
pkcs11:unit:sid:amd64

00:00:43

passed #162287
amd64 docker linux
system:asan:sid:amd64

00:07:18

passed #162314
amd64 docker linux
system:bionic:amd64

00:06:17

passed #162282
amd64 docker linux
system:centos6:amd64

00:06:33

passed #162313
amd64 docker linux
system:centos7:amd64

00:06:20

passed #162284
amd64 docker linux
system:jessie:amd64

00:06:32

passed #162286
amd64 docker linux
system:sid:amd64

00:06:34

passed #162315
i386 docker linux
system:sid:i386

00:06:17

passed #162285
amd64 docker linux
system:stretch:amd64

00:09:35

passed #162295
amd64 docker linux
system:xenial:amd64

00:06:15

passed #162279
amd64 docker linux
unit:asan:sid:amd64

00:00:51

passed #162296
amd64 docker linux
unit:bionic:amd64

00:00:49

passed #162274
amd64 docker linux
unit:centos6:amd64

00:00:44

passed #162275
amd64 docker linux
unit:centos7:amd64

00:00:50

passed #162280
amd64 docker linux
unit:clang:stretch:amd64

00:00:48

passed #162276
amd64 docker linux
unit:jessie:amd64

00:00:31

passed #162278
amd64 docker linux
unit:sid:amd64

00:00:48

passed #162281
i386 docker linux
unit:sid:i386

00:00:45

passed #162277
amd64 docker linux
unit:stretch:amd64

00:00:43

passed #162294
amd64 docker linux
unit:xenial:amd64

00:00:48

failed #162291
amd64 docker linux
pkcs11:system:sid:amd64

00:06:48

failed #162307
linux docker amd64
system:bionic:amd64

00:08:05

failed #162297
amd64 docker linux
system:bionic:amd64

00:08:58

failed #162310
linux docker amd64
system:centos7:amd64

00:07:32

failed #162283
amd64 docker linux
system:centos7:amd64

00:09:13

failed #162311
linux docker i386
system:sid:i386

00:07:53

failed #162288
i386 docker linux
system:sid:i386

00:09:34