Monitor diagnostics separation

Currently, show monitors prints all kinds of information from monitor settings to server status and numeric info. This leads to quite a lot of stuff being printed, most of which is not always needed. The printing should be broken down to two or more commands e.g. show monitor settings and show monitor status. The same situation may exist elsewhere in MaxScale status printing. Ideally, show servers would print all the server stats, combining information from routing, monitor etc.