OAK-1527 - Remove dependency on commons-beanutils

-- Copied the logic from jackrabbit-core/BeanConfig#newInstance to PropertiesUtils
-- Moved PropertiesUtils to oak-commons
-- Removed commons-beanutils

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1576589 13f79535-47bb-0310-9956-ffa450edef68