Magnesium SR1 Release Approval

Build logs are here :
https://jenkins.opendaylight.org/releng/view/autorelease/job/autorelease-release-magnesium-mvn35-openjdk11/266/

this distro:
https://nexus.opendaylight.org/content/repositories//autorelease-4063/org/opendaylight/integration/karaf/0.12.1/karaf-0.12.1.zip

this distribution test:
https://jenkins.opendaylight.org/releng/view/autorelease/job/integration-distribution-test-magnesium/246/

this tracking sheet :
https://docs.google.com/spreadsheets/d/1WgBX2c5DjQRfphM0sc3IKt7igW3EMxnUgANTcOlYD_U/edit?usp=sharing