ISSUE #464: Add JaCoCo code coverage configuration to master pom.xml
ISSUE #464: Add JaCoCo code coverage configuration to master pom.xml

Introduce JaCoCo configuration to the master pom.xml.
JaCoCo handles Java8 syntax better than Cobertura

Author: Enrico Olivelli <eolivelli@apache.org>

Reviewers: Sijie Guo <sijie@apache.org>

This closes #465 from eolivelli/issue-464-jacoco, closes #464

ivankelly/bookkeeper,apache/bookkeeper,apache/bookkeeper,sijie/bookkeeper,ivankelly/bookkeeper,sijie/bookkeeper,apache/bookkeeper,sijie/bookkeeper,sijie/bookkeeper,apache/bookkeeper,sijie/bookkeeper,apache/bookkeeper,sijie/bookkeeper,sijie/bookkeeper,apache/bookkeeper,sijie/bookkeeper,ivankelly/bookkeeper