Use GType constant string when setting dbclass property. Closes gh-35
Use GType constant string when setting dbclass property. Closes gh-35

midgardproject/midgard-core,midgardproject/midgard-core,piotras/midgard-core,piotras/midgard-core,midgardproject/midgard-core,piotras/midgard-core,piotras/midgard-core,midgardproject/midgard-core