SMW\ResultPrinter class turn RequestContext aware

+ Keep SMWResultPrinter as shell in order to avoid massive breakage

I haven't touch the ResultPrinterTest nor ResultPrintersTest both will
work with the deprecated \SMWResultPrinter class.

Using class_alias for 'SMWResultPrinter'
@see http://php.net/manual/en/function.class-alias.php

Change-Id: I3c056c5b4c5f6feec8215f686b6e736a516591b1
Merge "SMW\ResultPrinter class turn RequestContext aware"