Remove osx 10.8 nodes from Jenkins for machines that dont' exist

Change-Id: I6bee122db2be1cd53f7d3e19e8a33d8d3304c181
Reviewed-by: Heikki Halmet <heikki.halmet@digia.com>
Add 5 more windows 8.1 nodes to meet demand

Change-Id: I21bb56a325dee624c0052c57caacfec11d364a19
Reviewed-by: Heikki Halmet <heikki.halmet@digia.com>