Add OpenSuSE 13.1 to CI

OpenSuSE 13.1 was removed from CI due to reboot issues.
These are now solved and these can be brought back.

Change-Id: I2e6405d3dc6802efed1e10fac7f4810fa68affca
Reviewed-by: Simo Fält <simo.falt@digia.com>
Reduce the amount of 10.04 nodes

Only Qt4 is needing these, and 2 of those is enough.
Removing unused labels at the same time.

Change-Id: Ic51141131866b242252c6355400aeb69fd756048
Reviewed-by: Simo Fält <simo.falt@digia.com>