Use aliasByNode() to clean up metric labels

Add `aliasByNode(..., 2)` to all metrics before applying cactiStyle() to
change legend values from "MediaWiki.API.REALNAME.*" to "REALNAME".

Also remove unnecessary "0" second parameter to all cactiStyle()
functions.

Change-Id: I0cd7dde4d7817a11ed7d1d5f64506150d3a856d2