Phosphorus SR3 Release Approval

https://jenkins.opendaylight.org/releng/job/autorelease-release-phosphorus-mvn38-openjdk11/56/

Build logs are here :
https://s3-logs.opendaylight.org/logs/releng/vex-yul-odl-jenkins-1/autorelease-release-phosphorus-mvn38-openjdk11/56/

this distro:
https://nexus.opendaylight.org/content/repositories//autorelease-5927/org/opendaylight/integration/karaf/0.15.3/karaf-0.15.3.zip/

this distribution test:
https://jenkins.opendaylight.org/releng/view/autorelease/job/integration-distribution-test-phosphorus/416/