OAK-3803: Clean up the fixtures code in core and jcr modules
OAK-3803: Clean up the fixtures code in core and jcr modules

Adding commons-lang to oak-jcr as its required by RDBFixture#toString

git-svn-id: 67138be12999c61558c3dd34328380c8e4523e73@1723236 13f79535-47bb-0310-9956-ffa450edef68

davidegiannella/jackrabbit-oak,davidegiannella/jackrabbit-oak,davidegiannella/jackrabbit-oak,davidegiannella/jackrabbit-oak,davidegiannella/jackrabbit-oak