JCR-3048: Upgrade to latest Apache parent POM
JCR-3048: Upgrade to latest Apache parent POM

Merge o.a.j:parent into o.a.j:jackrabbit-parent and upgrade to o.a:a:9.

git-svn-id: 02b679d096242155780e1604e997947d154ee04a@1157043 13f79535-47bb-0310-9956-ffa450edef68

apache/jackrabbit,apache/jackrabbit,apache/jackrabbit