QPID-5610: move src/restapi/java -> qpid-qmf2-rest/src/main/java

git-svn-id: https://svn.apache.org/repos/asf/qpid/branches/QPID-5610-maven3-build-qmf-tools@1578025 13f79535-47bb-0310-9956-ffa450edef68