Phosphorus SR1 Release Approval

Build logs are here :
https://jenkins.opendaylight.org/releng/job/autorelease-release-phosphorus-mvn35-openjdk11/278/

this distro:

https://nexus.opendaylight.org/content/repositories//autorelease-5414/org/opendaylight/integration/karaf/0.15.1/karaf-0.15.1.zip

this distribution test:
https://jenkins.opendaylight.org/releng/view/autorelease/job/integration-distribution-test-phosphorus/233/