Changing this makes all constants in this class different from the ones in SPTemplateConstants, which I think it is desirable, but will require some extra changes in several other classes. (They currently behave as expected because of constants having same value)

In the GUI, it mostly affects:
- org.opennaas.gui.vcpe.utils.model.OpenNaaSBeanUtils 
- org.opennaas.gui.vcpe.utils.model.VCPEBeanUtils.
In opennnas it affects:
- org.opennaas.extensions.vcpe.capability.ip.VCPEIPCapability
- org.opennaas.extensions.vcpe.capability.vrrp.VCPEVRRPCapability
- org.opennaas.extensions.vcpe.capability.VCPEToRouterModelTranslator
- org.opennaas.extensions.vcpe.model.helper.VCPENetworkModelHelper (changing this class may not be required, if generated models are only used in SP tests)

It turns into a bigger-than-expected refactor :S