Merge branch 'release_notes_6.1' into 'master'

Release notes 6.1.0

See merge request !801
7 jobs for v6.1.0 in 154 minutes and 44 seconds (queued for 3 seconds)
latest
Status Job ID Name Coverage
  Static Ana
passed run_static_analysis_el6 #17259
158.39.77.235

00:06:33

 
  Packages
passed packages_deb9 #17260
build

02:21:27

passed packages_el6 #17261
build

00:35:58

passed packages_el7 #17262
build

02:19:33

 
  Deploy And Test
passed deploy_staging_centos7 #17265
docker-socket-runner1

00:05:16

passed deploy_staging_deb9 #17263
docker-socket-runner1

00:01:24

passed deploy_staging_el6 #17264
docker-socket-runner-bgo4

00:05:15