BGP: Long-lived graceful restart

The patch implements long-lived graceful restart for BGP, namely
draft-uttaro-idr-bgp-persistence-03.
32 jobs for <span class="ref-name">int-new</span> in 4 minutes and 10 seconds (queued for 11 seconds)
Status Job ID Name Coverage
  Image
passed #155277
dind allowed to fail
docker_centos-6-amd64

00:00:19

passed #155278
dind allowed to fail
docker_centos-7-amd64

00:00:20

passed #155267
dind allowed to fail
docker_debian-7-amd64

00:00:18

passed #155271
dind allowed to fail
docker_debian-7-i386

00:00:19

passed #155268
dind allowed to fail
docker_debian-8-amd64

00:00:19

passed #155272
dind allowed to fail
docker_debian-8-i386

00:00:17

passed #155269
dind allowed to fail
docker_debian-9-amd64

00:00:20

passed #155273
dind allowed to fail
docker_debian-9-i386

00:00:17

passed #155270
dind allowed to fail
docker_debian-testing-amd64

00:00:20

passed #155274
dind allowed to fail
docker_debian-testing-i386

00:00:17

passed #155275
dind allowed to fail
docker_fedora-25-amd64

00:00:19

passed #155276
dind allowed to fail
docker_fedora-26-amd64

00:00:19

passed #155279
dind allowed to fail
docker_opensuse-42_3-amd64

00:00:19

passed #155280
dind allowed to fail
docker_ubuntu-14_04-amd64

00:00:18

passed #155281
dind allowed to fail
docker_ubuntu-16_04-amd64

00:00:18

 
  Build
passed #155288
docker linux amd64
build-centos-6-amd64

00:01:10

passed #155289
docker linux amd64
build-centos-7-amd64

00:01:08

passed #155282
docker linux amd64
build-debian-7-amd64

00:01:04

passed #155293
docker linux amd64
build-debian-7-i386

00:01:18

passed #155283
docker linux amd64
build-debian-8-amd64

00:01:12

passed #155294
docker linux amd64
build-debian-8-i386

00:01:20

passed #155284
docker linux amd64
build-debian-9-amd64

00:01:12

passed #155295
docker linux amd64
build-debian-9-i386

00:01:24

passed #155285
docker linux amd64
build-debian-testing-amd64

00:01:13

passed #155296
docker linux amd64
build-debian-testing-i386

00:01:21

passed #155286
docker linux amd64
build-fedora-25-amd64

00:01:07

passed #155287
docker linux amd64
build-fedora-26-amd64

00:01:10

passed #155297
freebsd amd64
build-freebsd-11-amd64

00:02:58

passed #155298
freebsd i386
build-freebsd-11-i386

00:03:01

passed #155290
docker linux amd64
build-opensuse-42_3-amd64

00:01:07

passed #155291
docker linux amd64
build-ubuntu-14_04-amd64

00:01:10

passed #155292
docker linux amd64
build-ubuntu-16_04-amd64

00:01:18