Setting Nova, Neutron and Msiscsi services to automatic

Setting Nova, Neutron and MSiSCSI services to automatic (bnc#888497) ensures they
start when the system boots. Having the MSiSCSI service started and set
to Automatic is needed to be able to attach iSCSI devices as per http://docs.openstack.org/trunk/config-reference/content/hyper-v-virtualization-platform.html
Also it's related to https://bugzilla.suse.com/show_bug.cgi?id=888497 and it worked, tested twice.