icinga: capitalize Faidon's name & remove Asher

I use the capitalized form of my name to login, and while Apache mod
auth LDAP happily accepts it, Icinga was less happy to. Switch the
config to that.

Also while at it, remove Asher from the config, per his "remove access"
request.

Change-Id: Ib264b57f68e2cd247324d2f32e139cdd9ba79cfa