Fix some AliasWrapper references.

Remove HelpTest because it's a pretty lame test, not (and never
will be) an actual unit test, and a PITA to maintain.

Change-Id: Ibc15984a694a7b284e206ab337211ce471ac1913
Reviewed-on: http://gerrit.dmdirc.com/2706
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Greg Holmes <greg@dmdirc.com>