minor doc update, add Recommended Hadoop Versions in Installation guide
minor doc update, add Recommended Hadoop Versions in Installation guide

haoch/kylin,haoch/kylin,murkrishn/incubator-kylin,haoch/kylin,lemire/incubator-kylin,lemire/incubator-kylin,murkrishn/incubator-kylin,haoch/kylin,lemire/incubator-kylin,murkrishn/incubator-kylin,haoch/kylin,lemire/incubator-kylin,haoch/kylin,murkrishn/incubator-kylin