Magnesium SR2 Release Approval

Build logs are here :
https://jenkins.opendaylight.org/releng/view/autorelease/job/autorelease-release-magnesium-mvn35-openjdk11/352/

this distribution test:
https://jenkins.opendaylight.org/releng/view/autorelease/job/integration-distribution-test-magnesium/331/

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