install-server: move lvs3xxx stanzas

linux-host-entries is sorted, move the lvs3xxx stanzas between lvs1xxx
and lvs4xxx.

Change-Id: I6bd6af8a854439830d1f4f393af8a1312ce4ba33
install-server: add server lead.wikimedia.org

Change-Id: Ie045b9e6505f83a13ae1c31256565e8a7c0b6f44